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Assassination
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Image of Lincoln being shot by Booth while sitting in a theater booth.
Depiction of the assassination of Abraham Lincoln shown in the presidential booth of Ford's Theatre, from left to right, are assassin John Wilkes Booth, Abraham Lincoln, Mary Todd Lincoln, Clara Harris and Henry Rathbone.

Assassination is the willful killing, by a sudden or secret attack, of a person—especially a prominent or important one—typically for political or ideological reasons.[1][2][3]

Assassinations may be ordered by both individuals and organizations and carried out by their accomplices. Acts of assassination have been performed since ancient times. A person who carries out an assassination is called an assassin.[4]

Etymology

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Masyaf Castle in Hama. It was the headquarters of the Assassins in the Levant. Picture taken in 2017

Assassin comes from medieval Italian and French Assissini or Assassini, believed to derive from the word hashshashin (Arabic: حشّاشين, romanizedḥaššāšīn),[5] and shares its etymological roots with hashish (/hæˈʃʃ/ or /ˈhæʃʃ/ ; from حشيش ḥašīš).[6][7] It referred to a group of Nizari Ismailis known as the Order of Assassins who worked against various political targets.[8]

Founded by Hassan-i Sabbah, the Assassins were active in the Near East from the 11th to the 13th centuries. The group killed members of the Abbasid, Seljuk, Fatimid, and Christian Crusader elite for political and religious reasons.[8]

Although it is commonly believed that members of the Order of Assassins were under the influence of hashish during their killings or during their indoctrination, there is debate as to whether these claims have merit, with many Eastern writers and an increasing number of Western academics coming to believe that drug-taking was not the key feature behind the name.[9]

The term "assassinare" (assassin) was used in Medieval Latin from the mid 13th century.[6]

The earliest known use of the verb "to assassinate" in printed English was by Matthew Sutcliffe in A Briefe Replie to a Certaine Odious and Slanderous Libel, Lately Published by a Seditious Jesuite, a pamphlet printed in 1600, five years before it was used in Macbeth by William Shakespeare (1605).[10][11]

Use in history

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Ancient to medieval times

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Assassination is one of the oldest tools of power politics. It dates back at least as far as recorded history.[12]

The Egyptian pharaoh Teti, of the Old Kingdom Sixth Dynasty (23rd century BC), is thought to be the earliest known victim of assassination, though written records are scant and thus evidence is circumstantial. Two further ancient Egyptian monarchs are more explicitly recorded to have been assassinated; Amenemhat I of the Middle Kingdom Twelfth Dynasty (20th century BC) is recorded to have been assassinated in his bed by his palace guards for reasons unknown (as related in the Instructions of Amenemhat); meanwhile contemporary judicial records relate the assassination of New Kingdom Twentieth Dynasty monarch Ramesses III in 1155 BC as part of a failed coup attempt. Between 550 BC and 330 BC, seven Persian kings of Achaemenid Dynasty were murdered. The Art of War, a 5th-century BC Chinese military treatise mentions tactics of Assassination and its merits.[13]

In the Old Testament, King Joash of Judah was assassinated by his own servants;[14] Joab assassinated Absalom, King David's son;[15] King Sennacherib of Assyria was assassinated by his own sons;[16] and Jael assassinated Sisera.[17]

Chanakya (c. 350–283 BC) wrote about assassinations in detail in his political treatise Arthashastra. His student Chandragupta Maurya, the founder of the Maurya Empire, later made use of assassinations against some of his enemies.[18]

Some famous assassination victims are Philip II of Macedon (336 BC), the father of Alexander the Great, and Roman dictator Julius Caesar (44 BC).[19] Emperors of Rome often met their end in this way, as did many of the Muslim Shia Imams hundreds of years later. Three successive Rashidun caliphs (Umar, Uthman Ibn Affan, and Ali ibn Abi Talib) were assassinated in early civil conflicts between Muslims. The practice was also well known in ancient China, as in Jing Ke's failed assassination of Qin king Ying Zheng in 227 BC. Whilst many assassinations were performed by individuals or small groups, there were also specialized units who used a collective group of people to perform more than one assassination. The earliest were the sicarii in 6 AD, who predated the Middle Eastern Assassins and Japanese shinobis by centuries.[20][21]

In the Middle Ages, regicide was rare in Western Europe, but it was a recurring theme in the Eastern Roman Empire. Strangling in the bathtub was the most commonly used method. With the Renaissance, tyrannicide—or assassination for personal or political reasons—became more common again in Western Europe.[22]

Modern history

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18th-century depiction of the assassination of William the Silent by Balthasar Gérard on 10 July 1584

During the 16th and 17th centuries, international lawyers began to voice condemnation of assassinations of leaders. Balthazar Ayala has been described as "the first prominent jurist to condemn the use of assassination in foreign policy".[23] Alberico Gentili condemned assassinations in a 1598 publication where he appealed to the self-interest of leaders: (i) assassinations had adverse short-term consequences by arousing the ire of the assassinated leader's successor, and (ii) assassinations had the adverse long-term consequences of causing disorder and chaos.[23] Hugo Grotius's works on the law of war strictly forbade assassinations, arguing that killing was only permissible on the battlefield.[23] In the modern world, the killing of important people began to become more than a tool in power struggles between rulers themselves and was also used for political symbolism, such as in the propaganda of the deed.[24]

In Japan, a group of assassins called the Four Hitokiri of the Bakumatsu killed a number of people, including Ii Naosuke who was the head of administration for the Tokugawa shogunate, during the Boshin War.[25] Most of the assassinations in Japan were committed with bladed weaponry, a trait that was carried on into modern history. A video-record exists of the assassination of Inejiro Asanuma, using a sword.[26]

In 1895, a group of Japanese Rōnin assassins killed the Korean queen (and posthumously empress) Myeongseong.[27]

In the United States, from 1865 to 1963, four presidents—Abraham Lincoln, James A. Garfield, William McKinley and John F. Kennedy—died at the hands of assassins. There have been at least 20 known attempts on U.S. presidents' lives.[28]

A group of Thuggees strangling a traveller on a highway in India in the early 19th century

In Austria, the assassination of Archduke Franz Ferdinand and his wife Sophie, Duchess of Hohenberg was carried out in Sarajevo on June 28, 1914, by Gavrilo Princip, a Serbian nationalist. He is blamed for igniting World War I. Reinhard Heydrich died after an attack by British-trained Czechoslovak soldiers on behalf of the Czechoslovak government in exile in Operation Anthropoid,[29] and knowledge from decoded transmissions allowed the United States to carry out a targeted attack, killing Japanese Admiral Isoroku Yamamoto while he was travelling by plane.[30]

During the 1930s and 1940s, Joseph Stalin's NKVD carried out numerous assassinations outside of the Soviet Union, such as the killings of Organization of Ukrainian Nationalists leader Yevhen Konovalets, Ignace Poretsky, Fourth International secretary Rudolf Klement, Leon Trotsky, and the Workers' Party of Marxist Unification (POUM) leadership in Catalonia.[31] India's "Father of the Nation", Mahatma Gandhi, was shot to death on January 30, 1948, by Nathuram Godse.[32]

The African-American civil rights activist Martin Luther King Jr. was assassinated on April 4, 1968, at the Lorraine Motel (now the National Civil Rights Museum) in Memphis, Tennessee. Three years prior, another African-American civil rights activist, Malcolm X, was assassinated at the Audubon Ballroom on February 21, 1965.[33]

Cold War and beyond

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Indira Gandhi's blood-stained sari and belongings at the time of her assassination. She was the Prime Minister of India.

Most major powers repudiated Cold War assassination tactics, but many allege that was merely a smokescreen for political benefit and that covert and illegal training of assassins continues today, with Russia, Israel, the U.S., Argentina, Paraguay, Chile, and other nations accused of engaging in such operations.[34] After the Iranian Revolution of 1979, the new Islamic government of Iran began an international campaign of assassination that lasted into the 1990s. At least 162 killings in 19 countries have been linked to the senior leadership of the Islamic Republic of Iran.[35] The campaign came to an end after the Mykonos restaurant assassinations because a German court publicly implicated senior members of the government and issued arrest warrants for Ali Fallahian, the head of Iranian intelligence.[36] Evidence indicates that Fallahian's personal involvement and individual responsibility for the murders were far more pervasive than his current indictment record represents.[37]

In India, Prime Ministers Indira Gandhi and her son Rajiv Gandhi (neither of whom was related to Mahatma Gandhi, who had himself been assassinated in 1948), were assassinated in 1984 and 1991 in what were linked to separatist movements in Punjab and northern Sri Lanka, respectively.[38]

In 1994, the assassination of Juvénal Habyarimana and Cyprien Ntaryamira during the Rwandan Civil War sparked the Rwandan genocide.[39][40]

In Israel, Prime Minister Yitzhak Rabin was assassinated on November 4, 1995, by Yigal Amir, who opposed the Oslo Accords.[41][42] In Lebanon, the assassination of former Prime Minister Rafik Hariri on February 14, 2005, prompted an investigation by the United Nations. The suggestion in the resulting Mehlis report that there was involvement by Syria prompted the Cedar Revolution, which drove Syrian troops out of Lebanon.[citation needed]

On 2 September 2022, a 35 year old Brazilian national attempted to assassinate the then vice-president of Argentina, Cristina Fernández de Kirchner. However, the attempt was unsuccessful because the assassin's gun jammed.[43]

On 10 September 2025, American right-wing political activist and media personality Charlie Kirk was assassinated while speaking at a Turning Point USA rally at Utah Valley University.

United States government killing of citizens

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In 2012, The New York Times revealed that the Obama administration maintained a "kill list" containing terrorism suspects.[44] The list is sometimes referred to as a "disposition matrix", and President Obama made a final decision on whether anyone listed would be killed, without court oversight and without trial.[45] In September 2011, American citizens Anwar Al-Awlaki and Samir Khan were assassinated in Yemen by the United States government via drone strikes. Two weeks later, Awlaki's 16-year-old son, also an American citizen, was killed in a strike targeting Ibrahim al-Banna, a senior operative in Al-Qaeda.[46][47] Al-Banna was not killed in the strike.[46]

Further motivations

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As a military and foreign policy doctrine

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The functions of the ninja included espionage, sabotage and assassination.

Assassination for military purposes has long been espoused: Sun Tzu, writing around 500 BC, argued in favor of using assassination in his book The Art of War. Over 2000 years later, in his book The Prince, Machiavelli also advises rulers to assassinate enemies whenever possible to prevent them from posing a threat.[48]

For similar and additional reasons, assassination has also sometimes been used in the conduct of foreign policy. The costs and benefits of such actions are difficult to compute. It may not be clear whether the assassinated leader gets replaced with a more or less competent successor, whether the assassination provokes ire in the state in question, whether the assassination leads to souring domestic public opinion, and whether the assassination provokes condemnation from third-parties.[49][23] One study found that perceptual biases held by leaders often negatively affect decision making in that area, and decisions to go forward with assassinations often reflect the vague hope that any successor might be better.[49]

In both military and foreign policy assassinations, there is the risk that the target could be replaced by an even more competent leader, or that such a killing (or a failed attempt) will prompt the masses to contemn the killers and support the leader's cause more strongly. Faced with particularly brilliant leaders, that possibility has in various instances been risked, such as in the attempts to kill the Athenian Alcibiades during the Peloponnesian War. A number of additional examples from World War II show how assassination was used as a tool:

  • The assassination of Reinhard Heydrich in Prague on May 27, 1942, by the British and Czechoslovak government-in-exile. That case illustrates the difficulty of comparing the benefits of a foreign policy goal (strengthening the legitimacy and influence of the Czechoslovak government-in-exile in London) against the possible costs resulting from an assassination (the Lidice massacre).[49]
  • The American interception of Admiral Isoroku Yamamoto's plane during World War II after his travel route had been decrypted.
  • Operation Gaff was a planned British commando raid to capture or kill the German field marshal Erwin Rommel, also known as "The Desert Fox".[50]

Use of assassination has continued in more recent conflicts:

As a tool of insurgents

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Insurgent groups have often employed assassination as a tool to further their causes. Assassinations provide several functions for such groups: the removal of specific enemies and as propaganda tools to focus the attention of media and politics on their cause.[citation needed]

The Irish Republican Army guerrillas in 1919 to 1921 killed many Royal Irish Constabulary Police intelligence officers during the Irish War of Independence. Michael Collins set up a special unit, the Squad, for that purpose, which intimidated many policemen into resigning from the force. The Squad's activities peaked with the killing of 14 British agents in Dublin on Bloody Sunday in 1920.[citation needed]

The tactic was used again by the Provisional IRA during the Troubles in Northern Ireland (1969–1998). Assassination of unionist politicians and activists was one of a number of methods used in the Provisional IRA campaign 1969–1997. The IRA also attempted to assassinate British Prime Minister Margaret Thatcher by bombing the Conservative Party Conference in a Brighton hotel.[56] Loyalist paramilitaries retaliated by killing Catholics at random and assassinating Irish nationalist politicians.[57]

Basque separatists ETA in Spain assassinated many security and political figures since the late 1960s, notably the president of the Francoist government of Spain, Luis Carrero Blanco, 1st Duke of Carrero-Blanco Grandee of Spain, in 1973. In the early 1990s, it also began to target academics, journalists and local politicians who publicly disagreed with it.[58]

The Red Brigades in Italy carried out assassinations of political figures and, to a lesser extent, so did the Red Army Faction in Germany in the 1970s and the 1980s.[59]

In the Vietnam War, communist insurgents routinely assassinated government officials and individual civilians deemed to offend or rival the revolutionary movement. Such attacks, along with widespread military activity by insurgent bands, almost brought the Ngo Dinh Diem regime to collapse before the US intervened.[60]

Psychology

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A major study about assassination attempts in the US in the second half of the 20th century came to the conclusion that most prospective assassins spend copious amounts of time planning and preparing for their attempts. Assassinations are thus rarely "impulsive" actions.[61]

However, about 25% of the actual attackers were found to be delusional, a figure that rose to 60% with "near-lethal approachers" (people apprehended before reaching their targets). That shows that while mental instability plays a role in many modern assassinations, the more delusional attackers are less likely to succeed in their attempts. The report also found that around two-thirds of attackers had previously been arrested, not necessarily for related offenses; 44% had a history of serious depression, and 39% had a history of substance abuse.[61]

Techniques

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Modern methods

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Explosives, especially the car bomb, become far more common in modern history, with grenades and remote-triggered land mines also used, especially in the Middle East and the Balkans; the initial attempt on Archduke Franz Ferdinand's life was with a grenade. With heavy weapons, the rocket-propelled grenade (RPG) has become a useful tool given the popularity of armored cars (discussed below), and Israeli forces have pioneered the use of aircraft-mounted missiles.[62]

Carcano Model 38 of Lee Harvey Oswald, the assassin of President John F. Kennedy
Derringer of John Wilkes Booth, the assassin of President Abraham Lincoln

A sniper with a precision rifle is often used in fictional assassinations; however, certain pragmatic difficulties attend long-range shooting, including finding a hidden shooting position with a clear line of sight, detailed advance knowledge of the intended victim's travel plans, the ability to identify the target at long range, and the ability to score a first-round lethal hit at long range, which is usually measured in hundreds of meters. A dedicated sniper rifle is also expensive, often costing thousands of dollars because of the high level of precision machining and handfinishing required to achieve extreme accuracy.[63]

Despite their comparative disadvantages, handguns are more easily concealable and so are much more commonly used than rifles. Of the 74 principal incidents evaluated in a major study about assassination attempts in the US in the second half of the 20th century, 51% were undertaken by a handgun, 30% with a rifle or shotgun, 15% used knives, and 8% explosives (the use of multiple weapons/methods was reported in 16% of all cases).[61]

In the case of state-sponsored assassination, poisoning can be more easily denied. Georgi Markov, a dissident from Bulgaria, was assassinated by ricin poisoning. A tiny pellet containing the poison was injected into his leg through a specially designed umbrella. Widespread allegations involving the Bulgarian government and the KGB have not led to any legal results. However, after the fall of the Soviet Union, it was learned that the KGB had developed an umbrella that could inject ricin pellets into a victim, and two former KGB agents who defected stated that the agency assisted in the murder.[64] The CIA made several attempts to assassinate Fidel Castro; many of the schemes involving poisoning his cigars. In the late 1950s, the KGB assassin Bohdan Stashynsky killed Ukrainian nationalist leaders Lev Rebet and Stepan Bandera with a spray gun that fired a jet of poison gas from a crushed cyanide ampule, making their deaths look like heart attacks.[65] A 2006 case in the UK concerned the assassination of Alexander Litvinenko who was given a lethal dose of radioactive polonium-210, possibly passed to him in aerosol form sprayed directly onto his food.[66]

Targeted killing

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Predator combat drone; sometimes used in targeted killings

Targeted killing is the intentional killing by a government or its agents of a civilian or "unlawful combatant" who is not in the government's custody. The target is a person asserted to be taking part in an armed conflict or terrorism, by bearing arms or otherwise, who has thereby lost the immunity from being targeted that he would otherwise have under the Third Geneva Convention.[67]

On the other hand, Gary D. Solis, a professor at Georgetown University Law Center, in his 2010 book The Law of Armed Conflict: International Humanitarian Law in War,[68] wrote, "Assassinations and targeted killings are very different acts."[67] The use of the term "assassination" is opposed, as it denotes murder (unlawful killing), but the terrorists are targeted in self-defense, which is thus viewed as a killing but not a crime (justifiable homicide).[69] Abraham D. Sofaer, former federal judge for the US District Court for the Southern District of New York, wrote on the subject:

When people call a targeted killing an "assassination", they are attempting to preclude debate on the merits of the action. Assassination is widely defined as murder, and is for that reason prohibited in the United States ... U.S. officials may not kill people merely because their policies are seen as detrimental to our interests ... But killings in self-defense are no more "assassinations" in international affairs than they are murders when undertaken by our police forces against domestic killers. Targeted killings in self-defense have been authoritatively determined by the federal government to fall outside the assassination prohibition.[70]

Author and former U.S. Army Captain Matthew J. Morgan argued that "there is a major difference between assassination and targeted killing ... targeted killing [is] not synonymous with assassination. Assassination ... constitutes an illegal killing."[71] Similarly, Amos Guiora, a professor of law at the University of Utah, wrote, "Targeted killing is ... not an assassination."[72] Steve David, professor of international relations at Johns Hopkins University, wrote, "There are strong reasons to believe that the Israeli policy of targeted killing is not the same as assassination." Syracuse Law William Banks and GW Law Peter Raven-Hansen wrote, "Targeted killing of terrorists is ... not unlawful and would not constitute assassination."[73] Rory Miller writes: "Targeted killing ... is not 'assassination.'"[74] Eric Patterson and Teresa Casale wrote, "Perhaps most important is the legal distinction between targeted killing and assassination."[75]

On the other hand, the American Civil Liberties Union also states on its website, "A program of targeted killing far from any battlefield, without charge or trial, violates the constitutional guarantee of due process. It also violates international law, under which lethal force may be used outside armed conflict zones only as a last resort to prevent imminent threats, when non-lethal means are not available. Targeting people who are suspected of terrorism for execution, far from any war zone, turns the whole world into a battlefield."[76]

Yael Stein, the research director of B'Tselem, the Israeli Information Center for Human Rights in the Occupied Territories, also stated in her article "By Any Name Illegal and Immoral: Response to 'Israel's Policy of Targeted Killing'":[77]

The argument that this policy affords the public a sense of revenge and retribution could serve to justify acts both illegal and immoral. Clearly, lawbreakers ought to be punished. Yet, no matter how horrific their deeds, as the targeting of Israeli civilians indeed is, they should be punished according to the law. David's arguments could, in principle, justify the abolition of formal legal systems altogether.

Targeted killing has become a frequent tactic of the United States and Israel in their fights against terrorism.[67][78] The tactic can raise complex questions and lead to contentious disputes as to the legal basis for its application, who qualifies as an appropriate "hit list" target, and what circumstances must exist before the tactic may be used.[67] Opinions range from people considering it a legal form of self-defense that decreases terrorism to people calling it an extrajudicial killing that lacks due process and leads to further violence.[67][70][79][80] Methods used have included firing Hellfire missiles from Predator or Reaper drones (unmanned, remote-controlled planes), detonating a cell phone bomb, and long-range sniper shooting. Countries such as the US (in Pakistan and Yemen) and Israel (in the West Bank and Gaza) have used targeted killing to eliminate members of groups such as Al-Qaeda and Hamas.[67] In early 2010, with President Obama's approval, Anwar al-Awlaki became the first US citizen to be publicly approved for targeted killing by the Central Intelligence Agency. Awlaki was killed in a drone strike in September 2011.[81][82]

United Nations investigator Ben Emmerson said that US drone strikes may have violated international humanitarian law.[83][84] The Intercept reported, "Between January 2012 and February 2013, U.S. special operations airstrikes [in northeastern Afghanistan] killed more than 200 people. Of those, only 35 were the intended targets."[85]

Countermeasures

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Early forms

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A bodyguard who was killed by an IED during Sheik Abdul Sattar Abu Risha's assassination in 2007.

One of the earliest forms of defense against assassins was employing bodyguards, who act as a shield for the potential target; keep a lookout for potential attackers, sometimes in advance, such as on a parade route; and putting themselves in harm's way, both by simple presence, showing that physical force is available to protect the target,[61][86] and by shielding the target if any attack occurs. Failure to realize divided loyalties allowed the assassination of Indian Prime Minister Indira Gandhi, who was assassinated by two Sikh bodyguards in 1984.[87]

Modern strategies

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Assassination attempt on President Ronald Reagan
Pope Benedict XVI in a modified Mercedes-Benz M-Class Popemobile in São Paulo, Brazil

The methods used for protection by famous people have sometimes evoked negative reactions by the public, with some resenting the separation from their officials or major figures. One example might be traveling in a car protected by a bubble of clear bulletproof glass, such as the MRAP-like Popemobile of Pope John Paul II, built following an attempt at his life. Politicians often resent the need for separation and sometimes send their bodyguards away from them for personal or publicity reasons. US President William McKinley did so at the public reception in which he was assassinated.[88]

Other potential targets go into seclusion and are rarely heard from or seen in public, such as writer Salman Rushdie. A related form of protection is the use of body doubles, people with similar builds to those they are expected to impersonate. These people are then made up and, in some cases, undergo plastic surgery to look like the target, with the body double then taking the place of the person in high-risk situations. According to Joe R. Reeder, Under Secretary of the Army from 1993 to 1997, Fidel Castro used body doubles.[89]

US Secret Service protective agents receive training in the psychology of assassins.[90]

See also

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Notes and references

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Further reading

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[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia
from Grokipedia
Assassination is the premeditated and of a prominent individual, such as a political leader, by sudden or secret assault, typically driven by ideological, political, or religious motives rather than personal gain. The term derives from the assassinare, meaning to kill treacherously, ultimately tracing to the ḥashshāshīn, referring to members of the Nizari Ismaili sect who employed such tactics against adversaries in the 11th–13th centuries, though the association is likely apocryphal. Historically, assassinations predate the term, appearing in ancient tyrannicides justified as liberation from despots, but they proliferated as tools of factional strife, , and statecraft, often failing to achieve intended regime overthrows or policy reversals despite short-term disruptions. Empirical analyses of over a century of attempts reveal that while they correlate with heightened domestic instability and democratic erosion in targeted polities, successful hits rarely sustain the assassin's goals, frequently entrenching successors or escalating conflicts due to rally effects and institutional resilience. In contemporary contexts, methods have evolved from blades and poisons to firearms, improvised explosives, and precision strikes via unmanned systems, with state-sponsored variants blurring lines between assassination and lawful targeting in warfare, though international norms largely proscribe peacetime acts as illicit . Such killings underscore causal dynamics where individual agency intersects with systemic incentives, often amplifying grievances without resolving underlying power imbalances.

Definition and Terminology

Etymology

The English term assassination entered usage in the early , derived from the assassinate, which first appeared around meaning "to kill wrongfully by sudden or secret ." This stems from assassinare, a formation influenced by the assassin, which had been adopted into European languages centuries earlier to denote practitioners of such killings. The root word assassin originated in the 1530s in English via Anglo-Latin assassinus, borrowed from medieval French and Italian assassino or assassino, ultimately tracing to ḥashshāshīn (حشّاشين), the of ḥashshāsh, meaning "hashish-user." This term referred to members of the Nizari Ismaili sect, a branch of founded by Hassan-i Sabbah around 1090 in Persia, who employed stealthy, targeted murders—often with daggers—against Sunni Muslim rulers, Crusader leaders, and other political foes between the late 11th and mid-13th centuries. European Crusaders and chroniclers, encountering these (devoted agents), popularized the term in the West, associating it with the sect's reputed use of to induce trance-like obedience or hallucinations, though historical evidence for widespread drug use among them remains anecdotal and contested. Linguistic debate persists over the precise Arabic derivation, with some scholars arguing that ḥashshāshīn was a pejorative label coined by the sect's enemies to imply debauched outcasts, rather than a self-designation; an alternative etymology proposes asāsiyyūn (أساسيون), denoting "those who adhere to the foundation" or core principles of Ismaili faith, as the intended root, which European observers may have misheard or corrupted. Regardless, the word's evolution cemented its connotation of covert, ideologically motivated killing, distinct from mere murder or execution, influencing modern definitions across languages.

Core Definitions and Distinctions

Assassination refers to the premeditated of a prominent person, executed through sudden or clandestine means, frequently driven by political, ideological, or strategic motives. This act targets individuals whose death is intended to produce broader societal, governmental, or institutional disruption, such as leaders, officials, or influencers whose removal advances the perpetrator's agenda. The method often involves , , or fire to minimize resistance and maximize surprise, underscoring the emphasis on secrecy over open confrontation. Central to the concept is its distinction from ordinary murder, which constitutes any unlawful killing with malice aforethought but does not require a high-profile victim or ulterior purpose beyond personal gain, revenge, or impulse. While all assassinations qualify as murders under criminal law—lacking legal justification and involving intent—they elevate the crime through the victim's status and the ripple effects of their elimination, such as policy shifts or power vacuums. In contrast to state executions, which entail formalized, judicially sanctioned killings for convicted crimes like capital offenses, assassinations bypass due process and authority, rendering them inherently illicit even if ideologically framed as corrective. Further demarcations arise in martial contexts, where lawful targeting of enemy combatants during active hostilities—governed by —differs from assassination's implication of treachery or peacetime , such as violating truces or feigning civilian status to strike. U.S. statutes, for instance, define assassination narrowly in protective clauses, such as the motivated killing of federal judges during official duties, highlighting its application to threats against judicial integrity rather than a standalone offense. These boundaries underscore assassination's role as a tactic of , not mere , often blurring into state-sponsored operations despite formal prohibitions in domestic and international norms.

Historical Context

Ancient and Classical Eras

Assassinations in often targeted tyrants perceived as threats to emerging democratic ideals, with the act of sometimes glorified as a civic duty. In 514 BC, assassinated , brother of the Athenian tyrant , during the Panathenaic festival, aiming to end Peisistratid rule; though the plot failed to topple , the killers were posthumously honored as liberators, with bronze statues erected in the Agora symbolizing resistance to . This event influenced later Greek views on against rulers, embedding in cultural narratives. Political rivalries escalated assassinations in the , exemplified by the 336 BC killing of by his bodyguard during a theatrical celebrating his daughter Cleopatra's wedding. Pausanias acted on a personal vendetta after alleged abuse by Philip's entourage, though ancient accounts speculate involvement of Philip's wife or Persian agents to thwart his invasion plans; the assassination cleared the path for Alexander the Great's ascension, reshaping Mediterranean power dynamics. In , assassinations marked transitions from to empire, often driven by senatorial opposition to centralized power. , a pushing land reforms, was clubbed to death by opponents led by Scipio Nasica in 133 BC on the , initiating cycles of that undermined republican norms. Julius Caesar's dictatorship ended on March 15, 44 BC, when approximately 60 senators, including and , stabbed him 23 times in the Theatre of , citing restoration of the ; the act instead provoked leading to Augustus's rule. Under the empire, assassinations proliferated among rulers, with 23 of the first 82 emperors dying violently by murder or execution between 27 BC and 395 AD. (Gaius Julius Caesar Augustus Germanicus) was slain in 41 AD by officers, including , in a palace corridor amid grievances over his erratic tyranny and financial exactions; his uncle succeeded him after the Guard's intervention. Such killings highlighted praetorian influence and the fragility of imperial succession, often justified as but frequently opportunistic.

Medieval to Early Modern Periods

The Order of Assassins, known as the Hashashin or Nizari Ismailis, emerged in the late 11th century under Hasan-i Sabbah in Persia and Syria, employing targeted killings as a primary tactic against Sunni Seljuk rulers and Crusader leaders. Operating from fortified strongholds like Alamut Castle, these fedayeen assassins used daggers for close-range strikes, often infiltrating public spaces to eliminate high-profile targets such as the vizier Nizam al-Mulk in 1092 and Conrad of Montferrat in 1192. Their methodical approach, emphasizing psychological terror over mass violence, influenced the modern concept of assassination, though legends of hashish-induced fanaticism are likely exaggerated. The order persisted until Mongol invasions dismantled their strongholds in the mid-13th century. In medieval , assassinations frequently arose from church-state conflicts and feudal rivalries, exemplified by the 1170 murder of Archbishop in . Four knights—Reginald , Hugh de Morville, , and —attacked following King Henry II's frustrated outburst "Will no one rid me of this turbulent priest?", hacking him with swords and axes during on December 29. Though Henry did not directly order the killing, the act stemmed from 's defense of ecclesiastical privileges against royal encroachment, shocking Christendom and prompting Henry's public . 's in 1173 underscored the era's intertwining of political murder and religious sanctity. Transitioning to the early modern period, the adoption of firearms enabled more precise and distant attacks, as seen in the 1584 assassination of William the Silent, Prince of Orange, on July 10 in Delft. Balthasar Gérard, a French Catholic motivated by Philip II of Spain's 25,000-crown bounty and papal bull declaring William an outlaw, shot him twice with a wheellock pistol while he dined, marking the first regicide by handgun. Gérard's act aimed to halt the Dutch Revolt against Spanish rule but instead galvanized Protestant resistance, leading to his torture and quartering. Similarly, in 1610, François Ravaillac stabbed King Henry IV of France four times in his carriage on May 14 in Paris, driven by fanatical opposition to Henry's alliances with Protestant states and perceived toleration policies post-Edict of Nantes. Ravaillac's execution by drawing and quartering failed to prevent the Bourbon dynasty's consolidation, but the killing disrupted France's military preparations against the Habsburgs. These incidents highlight a where religious schisms—Catholic versus Protestant or Sunni versus Ismaili—fueled targeted eliminations of leaders perceived as threats to doctrinal purity or territorial control, often by lone actors or small groups invoking divine sanction. While medieval killings relied on blades and brute force amid chaotic courts, early modern cases leveraged emerging technology, amplifying the strategic impact on emerging nation-states.

19th and 20th Centuries

The 19th century marked a surge in assassinations of heads of state and prominent political figures, fueled by rising anarchist movements, nationalist fervor, and responses to monarchical and imperial systems amid rapid industrialization and social upheaval. These acts often stemmed from ideological convictions that targeted leaders as symbols of oppression, with perpetrators frequently acting as "propaganda of the deed" to inspire broader revolution. From 1875 onward, data indicate hundreds of attempts on world leaders, reflecting heightened political instability. Prominent examples include the assassination of U.S. President Abraham Lincoln on April 14, 1865, by Confederate sympathizer John Wilkes Booth, who shot him during a performance at Ford's Theatre in Washington, D.C., motivated by opposition to emancipation and Union victory in the Civil War. Less than two decades later, President James A. Garfield was shot on July 2, 1881, by Charles Guiteau, a delusional office-seeker who claimed divine inspiration and frustration over rejected patronage appointment, leading to Garfield's death from infection on September 19. Anarchist violence escalated with the bombing and shooting death of Russian Tsar Alexander II on March 1, 1881, by members of the Narodnaya Volya group, who sought to dismantle autocracy through targeted elimination. Similar motives drove the stabbing of Austrian Empress Elisabeth on September 10, 1898, by Italian anarchist Luigi Lucheni, and the shooting of Italian King Umberto I on July 29, 1900, by Gaetano Bresci, avenging perceived state repression. Transitioning into the early 20th century, U.S. President was shot on September 6, 1901, by Polish-American anarchist at the in , viewing McKinley as emblematic of capitalist exploitation; McKinley succumbed to on September 14. The of Austria on June 28, 1914, by Bosnian Serb nationalist in , precipitated by triggering Austria-Hungary's ultimatum to and alliance mobilizations. Throughout the , assassinations proliferated amid ideological conflicts, world wars, and , shifting from predominantly lone anarchist actors to organized groups, including state-backed operations. Over one-third of U.S. presidents faced attempts, with two successful killings: on November 22, 1963, by in , amid tensions and domestic unrest. Other notable cases included the ice axe murder of exiled Soviet leader on August 21, 1940, by agent Ramón in , ordered by to eliminate a rival. Indian independence leader was shot on January 30, 1948, by , a Hindu nationalist opposing Gandhi's concessions to Muslims during partition. Egyptian President fell to military radicals on October 6, 1981, during a , reacting to his with . These events often destabilized regimes, though empirical analysis shows mixed impacts on policy shifts or war outcomes, with successes rare in altering institutional trajectories. Attempts persisted, such as the March 30, 1981, shooting of U.S. President Ronald Reagan by John Hinckley Jr., driven by personal obsession rather than ideology, highlighting evolving psychological and opportunistic motives alongside political ones. Overall, the era's assassinations underscored vulnerabilities in open societies and the limited causal efficacy of such acts in achieving assassins' goals, frequently resulting in backlash or continuity of targeted policies.

Cold War and Post-Cold War Developments

During the era, assassinations evolved into instruments of statecraft, primarily through covert operations by intelligence agencies amid superpower rivalries and proxy conflicts. The (CIA) pursued numerous plots against perceived adversaries, including over 600 documented attempts on Cuban leader between 1960 and 1965, employing methods such as poisoned cigars, exploding seashells, and mobster collaborations, though none succeeded. Similarly, the CIA supported the 1961 assassination of Congolese Prime Minister via Belgian operatives using poisoned toothpaste and ammunition, driven by fears of Soviet influence in . The Soviet maintained a specialized assassination unit, the 13th Department (later Directorate), responsible for "wet affairs" targeting defectors and dissidents, exemplified by the 1978 killing of Bulgarian dissident in via a ricin-laced umbrella tip administered by a disguised agent. These operations reflected a broader pattern of deniable state-sponsored killings, often justified by ideological containment but revealing ethical lapses upon declassification; the U.S. Senate's Church Committee in 1975 condemned such plots as incompatible with American principles, leading to Executive Order 11905 banning political assassinations. High-profile non-state cases persisted, including the 1963 assassination of U.S. President John F. Kennedy by Lee Harvey Oswald, a Marxist sympathizer with Soviet ties, amid escalating tensions over Cuba and Vietnam, though official investigations attributed it to a lone actor. Attempts on figures like President Ronald Reagan in 1981 by John Hinckley Jr., motivated by personal delusion rather than ideology, and Pope John Paul II by Mehmet Ali Ağca, with alleged Bulgarian-KGB backing to counter Solidarity's anti-communist rise, underscored vulnerabilities in democratic leaders. Post-Cold War developments shifted emphasis from bipolar proxy assassinations to those by non-state actors and precision state-targeted killings enabled by technology. The 1991 assassination of Indian by a (LTTE) suicide bomber marked the rise of terrorist groups using human-borne explosives for political elimination, a tactic proliferating in asymmetric conflicts. In the , the 1995 murder of Israeli by Jewish extremist halted peace momentum, illustrating domestic ideological backlash against concessions. Islamist networks escalated such acts, including the 2007 killing of Pakistani via a gunman and bomber linked to Tehrik-i-Taliban Pakistan, amid electoral instability. States adapted with remote methods, particularly the ' post-9/11 drone program, initiating armed Predator strikes in 2002 against in and expanding under Presidents Bush, Obama, and beyond to over 500 strikes in alone by 2018, targeting leaders like in 2006 via Hellfire missiles. This approach, justified as necessity, killed an estimated 2,200-3,500 militants but raised concerns over civilian casualties (300-900 reported) and , with Obama authorizing 563 strikes compared to Bush's 57. Such operations normalized extraterritorial targeted killings outside declared war zones, diverging from Cold War-era bans while leveraging real-time intelligence for reduced risk to operators, though critics note potential escalation of radicalization.

Motivations and Rationales

Political and Ideological Impulses

Political and ideological impulses in assassination arise from perpetrators' beliefs that targeted leaders embody barriers to a preferred political order, such as tyranny, , or ideological deviation, with removal expected to catalyze , policy reversal, or national liberation. These motives often draw on theories justifying violence against rulers perceived as illegitimate, including the classical doctrine of , which framed the killing of despots as a civic to restore republican liberty, as argued in viewing tyrants as enemies outside . Empirical analyses of over 750 assassination attempts from 1946 to 2013 indicate such acts cluster in polarized contexts with restricted competition, where assassins seek to advance radical visions amid perceived threats to group interests or values. In the late 19th and early 20th centuries, anarchist ideology propelled a wave of "," positing targeted killings as sparks for mass uprising against state authority and . assassinated Italian King Umberto I on July 29, 1900, to protest repression of workers, exemplifying anarchists' view of monarchs as symbols of hierarchical oppression. Similarly, , inspired by anarchist rhetoric, shot U.S. President on September 6, 1901, declaring the act a blow against governmental tyranny and economic exploitation. These incidents reflected a causal logic that elite elimination would erode institutional legitimacy, though data from 1875 onward shows most such efforts fail to induce systemic or war termination. Nationalist ideologies have similarly driven assassinations to dismantle multi-ethnic empires or partition outcomes. Gavrilo Princip and associates from the Black Hand group killed Archduke Franz Ferdinand on June 28, 1914, motivated by Serb irredentism aiming to liberate South Slav territories from Austro-Hungarian rule and forge a unified Yugoslavia. In post-colonial contexts, ideological opposition to perceived concessions fueled the January 30, 1948, murder of Mohandas Gandhi by Nathuram Godse, a Hindu nationalist who blamed Gandhi's advocacy for Hindu-Muslim unity and acceptance of India's partition for weakening Hindu interests against Pakistan. Since the 1970s, terrorist organizations have integrated assassination into ideological campaigns, as in the 1995 killing of Israeli Prime Minister Yitzhak Rabin by an opponent of Oslo peace accords, intended to derail territorial compromises with Palestinians. Such cases underscore assassins' reliance on causal assumptions of decisive impact, often overstated given historical patterns of institutional resilience.

Religious and Fanatical Drivers

Religious drivers in assassinations frequently arise from perceptions of the target as a heretic, apostate, or obstacle to divine order, compelling perpetrators to view the act as a sacred imperative or martyrdom. Fanatical devotion, often intertwined with religious ideology, prioritizes eschatological or doctrinal purity over secular law, enabling assassins to rationalize murder through interpretations of holy texts that sanction violence against perceived enemies of faith. Such motivations have persisted across eras, distinct from purely political rationales by invoking supernatural justification and promises of eternal reward. In 1584, , a French Catholic zealot, assassinated , , on July 10 in , , shooting him with a after infiltrating his home. Gérard acted out of fervent opposition to William's Protestant leadership in the Dutch Revolt against Spanish Catholic rule, motivated by a 300,000-crown bounty offered by and his belief in fulfilling a holy crusade against . Gérard endured post-capture, viewing his suffering as redemptive, and was executed by and quartering on July 14, 1584. Twentieth-century instances underscore Islamist extremism's role. Egyptian President was killed on October 6, 1981, during a in by Khalid al-Islambouli and four accomplices from . The attackers targeted for his 1979 peace treaty with , deeming it a betrayal of Islamic principles and collaboration with infidels; Islambouli shouted "I have killed the " during the assault, invoking Quranic imagery of tyranny. The plot involved over 300 bullets fired from concealed weapons, killing Sadat and wounding others, with perpetrators executed in 1982 after trials revealing ties to broader jihadist networks. Sikh religious grievances fueled the October 31, 1984, assassination of Indian Prime Minister by her bodyguards Beant Singh and at her residence. The killers acted in retaliation for , Gandhi's June 1984 military assault on the in to dislodge Sikh militants, which damaged the Sikh holy site and killed hundreds, including pilgrims. Singh fired 33 rounds from a , motivated by outrage over the perceived desecration of Sikh faith symbols and demands for Khalistan independence. Beant Singh was killed on-site; was hanged in 1989. Jewish extremism drove the November 4, 1995, murder of Israeli Prime Minister by outside a peace rally. Amir, a law student affiliated with right-wing settler movements, shot Rabin twice with a pistol, opposing the ' territorial concessions as a violation of biblical commandments to retain the . Amir invoked the halakhic concept of din rodef (law of the pursuer), arguing Rabin endangered Jewish lives by endangering through peace negotiations with . Convicted and sentenced to life, Amir's act stemmed from ultra-nationalist religious ideology blending interpretations with opposition to secular diplomacy. These cases highlight how fanatical religious lenses transform policy disputes into existential spiritual battles, often escalating to violence without regard for collateral consequences or legal repercussions, as assassins prioritize otherworldly validation over empirical outcomes.

Personal, Criminal, and Opportunistic Motives

Personal motives in assassinations typically stem from individual grievances such as revenge, obsession, or a desire for personal notoriety, distinct from broader ideological goals. In ancient cases, Pausanias of Orestis assassinated Philip II of Macedon in 336 BCE after enduring public humiliation and sexual assault by Philip's associates, for which the king failed to deliver justice despite Pausanias's pleas. This act was driven by a quest to restore personal honor rather than political ambition, though it facilitated Alexander the Great's rise. In modern instances, psychological fixation has propelled similar acts against prominent figures. Mark David Chapman murdered John Lennon outside his New York City apartment on December 8, 1980, explicitly to achieve fame and emulate the anti-phoniness theme from J.D. Salinger's The Catcher in the Rye, viewing Lennon as a hypocritical celebrity. Chapman later confirmed his motive as a pursuit of notoriety, stating he targeted Lennon solely for his fame. Similarly, John Hinckley Jr. attempted to assassinate President Ronald Reagan on March 30, 1981, in a delusional bid to impress actress Jodie Foster, inspired by the film Taxi Driver, with no political intent but rather a personal obsession. Criminal motives often involve groups eliminating threats to illicit operations, such as or officials impeding financial gains from activities like drug trafficking or . In , the Cosa Nostra mafia orchestrated the assassination of Giovanni on May 23, 1992, via a 500 kg explosive device on the A29 highway, aiming to derail anti-mafia prosecutions that threatened their control over construction rackets and public contracts worth billions of lire. Such killings protect criminal enterprises by intimidating judicial systems and maintaining territorial dominance for profit. In the United States, the murdered Vincent Sherry and his wife Margaret in 1987 to silence investigations into corruption and gambling rings, exposing how localized crime syndicates target public figures for economic preservation. Opportunistic motives exploit vulnerabilities for immediate material benefit, blending robbery with targeted killing of accessible high-value individuals. The Thuggee cult in 19th-century India conducted ritual strangulations of travelers, amassing loot from hundreds of victims annually across the subcontinent, with murders framed as offerings to Kali but yielding secondary gains in gold and goods divided among members. British suppression campaigns from 1830 onward documented over 2,000 Thuggees convicted, revealing a network that preyed on caravans for plunder under guise of religious duty. In early 20th-century Oklahoma, the Osage Indian murders involved systematic poisonings and shootings from 1918 to 1931, where opportunists like William Hale conspired to inherit oil-rich headrights valued at millions, defrauding and killing at least 60 Osage members to seize mineral wealth amid lax guardianship laws. These cases illustrate how perceived windfalls drive assassins to capitalize on unprotected elites or isolated targets.

State-Sponsored Strategic Justifications

States sponsor assassinations as a strategic instrument to neutralize high-value threats to national security, disrupt adversarial networks, and achieve deterrence without committing to broader military engagements. These operations are typically framed as acts of self-defense or preemptive action against imminent dangers, such as terrorist leaders orchestrating attacks or hostile agents undermining sovereignty. Proponents argue that targeted eliminations minimize collateral risks compared to invasions, allowing precision strikes via intelligence-driven methods like drones or special forces, thereby preserving operational secrecy and reducing domestic political costs. Empirical analyses indicate short-term reductions in attack frequencies following such killings, though long-term efficacy remains contested due to potential radicalization effects. Israel's program exemplifies this rationale, initiated prominently after the 1972 Munich Olympics massacre where militants killed 11 Israeli athletes. In response, Mossad's Operation Wrath of God systematically assassinated planners and perpetrators across and the between 1972 and 1988, aiming to impose costs on terrorist organizations and deter future operations by demonstrating relentless pursuit. Israeli officials justified these as necessary retribution and incapacitation, arguing that decapitating leadership structures hampers operational continuity; studies of the Second (2000–2005) period, during which over 300 targeted killings occurred, found they correlated with temporary declines in Palestinian suicide bombings by raising the perceived risks for militants. This approach aligns with a compellence strategy, where the threat of personalized lethality compels restraint among non-state actors. The has employed similar justifications in its post-9/11 drone campaign, authorizing strikes against and affiliated leaders to dismantle command hierarchies and prevent attacks on American interests. From 2004 onward, CIA and military operations in , , and eliminated figures like in 2011, cited as operational commanders in plots such as the 2009 underwear bombing attempt. Administrations from Bush to Biden have defended these under as lawful per UN Charter Article 51, emphasizing intelligence-verified threats and minimal civilian exposure via unmanned aerial vehicles; Pakistani data from the strikes report over 2,000 terrorists killed with limited losses, supporting claims of strategic disruption to 's regenerative capacity. Critics, including some scholars, note recruitment spikes post-strikes, but official rationales prioritize immediate threat neutralization over speculative blowback. Authoritarian regimes, such as , pursue state-sponsored eliminations primarily to safeguard regime stability by silencing domestic critics and exiles perceived as security risks. Operations like the 2006 polonium in and the 2018 and 2020 Novichok attacks on and are attributed to Russian intelligence for their deniability and exemplary effect, deterring defection or opposition by signaling impunity's consequences. While officially denies involvement, declassified intelligence assessments describe these as authorized to counter "high-profile figures abroad" threatening internal order, with at least seven such incidents since 2014 aimed at transnational repression. This contrasts with democratic justifications by prioritizing internal control over external threats, though both invoke existential security imperatives.

Methods and Techniques

Traditional and Close-Range Approaches

Traditional assassination methods emphasized direct physical access to the target, often exploiting public appearances, trusted proximity, or betrayal to execute attacks with handheld weapons. These approaches, prevalent from antiquity through the 19th century, relied on blades, early firearms, or manual strangulation, prioritizing concealability and immediacy over distance or technology. Success depended on the assassin's ability to evade security and deliver a fatal blow before countermeasures, with high personal risk of capture or retaliation. Stabbing with daggers or knives constituted a primary technique in ancient and medieval contexts, allowing concealed strikes during close encounters. Roman senators assassinated on , 44 BC, by surrounding and stabbing him 23 times in the Theatre of Pompey, motivated by fears of his consolidating power. Similarly, in medieval , assassins favored stilettos or poniards for thrusting into vital areas like the or , as these weapons pierced armor gaps or effectively. The advent of reliable handguns in the introduced close-range shooting, enabling attacks from arm's length with or derringers. shot , , on July 10, 1584, in , , using two pistols loaded with powder and bullets, striking him in the chest and killing him within hours; Gérard was tortured and executed shortly after. In 1812, assassinated British Prime Minister in the lobby with a single .69-caliber pistol shot to the chest, citing personal grievances over financial losses. John Wilkes Booth exemplified 19th-century close-range firearm use by firing a .44-caliber Philadelphia Deringer into President Abraham Lincoln's head on April 14, 1865, from about 3 feet away in box during a performance of . Booth then slashed Major Henry with a knife before leaping to the stage, shouting "." Such methods persisted into the early , as seen in the 1904 shooting of Russian Governor-General Nikolai Bobrikov by in . Manual strangulation, including with cords, wires, or hands, offered silent execution but required sustained physical dominance, often employed by organized groups or in opportunistic ambushes. Indian cult members, active from the 13th to 19th centuries, assassinated an estimated 500,000 to 2 million travelers by ritual strangulation with rumals (handkerchiefs), targeting wealthy merchants under the guise of companionship before looting. , evolving from execution devices, were adapted for assassinations due to their minimal noise and need for no blade or powder.

Modern Technological and Covert Methods

Advancements in technology have enabled assassins to conduct killings from afar, reducing direct exposure while enhancing precision and deniability. Unmanned aerial vehicles (UAVs), or drones, facilitate remote strikes using precision-guided munitions, a method pioneered extensively by the post-9/11. Between 2004 and 2018, U.S. drone operations in alone resulted in over 2,200 strikes, targeting high-value militants with Hellfire missiles launched from platforms like the MQ-1 Predator. These operations, often conducted by the CIA, exemplify state-sponsored targeted killings, where operators in distant control rooms identify and eliminate targets based on intelligence. A notable case occurred on September 30, 2011, when a U.S. drone strike in Yemen killed Anwar al-Awlaki, a dual U.S.-Yemeni citizen and al-Qaeda operative, marking the first confirmed extrajudicial killing of an American citizen abroad via this method. Drone efficacy relies on real-time surveillance integration, but civilian casualties—estimated at 10-20% in some analyses—highlight operational risks and ethical debates, though proponents argue net reductions in terrorist threats. Similar tactics have been adopted by other states, including Israel, which employs drones for border and extraterritorial operations against perceived threats. Beyond aerial platforms, ground-based remote systems incorporate for autonomous targeting. In November 2020, Iranian nuclear scientist was assassinated near using a belt-fed mounted on a , remotely operated via with AI-assisted aim to compensate for operator distance and target movement; no operatives were present on site. This operation, attributed to Israeli intelligence, demonstrates how and extend covert reach, allowing kills without human proximity. Covert chemical assassinations persist through advanced toxins, often state-delivered for plausibly deniable elimination. Polonium-210, a rare radioactive isotope, was used to poison former Russian FSB officer Alexander Litvinenko in London on November 1, 2006; he succumbed 22 days later to acute radiation syndrome after ingesting trace amounts in tea, with the isotope's scarcity pointing to state origins. Similarly, Novichok nerve agents—developed in the Soviet era as undetectable chemical weapons—featured in the March 4, 2018, attack on ex-spy Sergei Skripal and daughter Yulia in Salisbury, UK, applied via door handle contamination, leaving them critically ill but surviving due to rapid decontamination. Russian opposition figure Alexei Navalny was poisoned with Novichok on August 20, 2020, during a flight from Tomsk, Siberia, via underwear application, confirmed by independent labs after his evacuation to Germany. These cases underscore nerve agents' utility in covert ops for delayed onset mimicking natural illness, though forensic traceability has eroded deniability. Explosive devices with remote detonation, enhanced by GPS and cellular triggers, enable vehicle-borne or implanted kills. Intelligence agencies have refined these for proxy use, minimizing attribution, as seen in alleged operations against Israeli targets. While cyber methods like hacking insulin pumps or pacemakers remain theoretical—lacking verified assassinations—their potential integration with physical delivery systems signals evolving hybrid threats. Overall, these techniques prioritize operational and , shifting assassination from artisanal acts to industrialized precision.

Psychological Factors

Profiles of Assassins

Psychological analyses of assassins reveal no singular demographic or clinical profile that reliably predicts such acts, challenging earlier of the "lone nut" or universal . The U.S. Secret Service's Exceptional Project (ECSP), examining 83 attackers and near-lethal approachers targeting U.S. public officials from 1949 to 1994, determined that individuals varied widely in age (typically 20s to 40s, averaging around 35), , status, and marital history, with no consistent physical or markers distinguishing them from the general population. Approximately 64% had prior contacts, including diagnoses of depression (44%), schizophrenia-spectrum disorders (28%), or personality disorders (44%), yet 36% showed no such history, indicating that untreated severe mental illness alone does not precipitate assassination. This absence of a profile underscores that assassination emerges from behavioral pathways rather than inherent traits: a perceived escalates into fixation on the target as the cause, followed by ideation of as redress, of the victim's routines, acquisition of means, and execution, often spanning months. Among lone actors—distinct from state-directed operatives—common psychological threads include narcissism, paranoia, and a distorted sense of agency, where the assassin views the act as a pathway to historical significance or policy influence. ECSP data showed 78% of subjects experienced significant personal failures (e.g., job loss, relationship breakdowns) preceding their fixation, interpreting these as orchestrated by the target, which fueled a compartmentalized obsession with attack planning while maintaining outward normalcy. Delusional subtypes, comprising about 25-30% in historical U.S. cases like John Hinckley's obsession with actress Jodie Foster intertwined with presidential symbolism, exhibit psychosis-driven narratives, such as messianic roles or supernatural mandates. In contrast, nondelusional assassins, like Lee Harvey Oswald (ideologically Marxist with a history of defection and marital strife), demonstrate rigid ideological commitment masking underlying resentment, with 41% of ECSP cases expressing desires for fame, revenge, or coerced change rather than pure altruism. Empirical reviews of global political assassins highlight similar patterns, with mental health comorbidities in 50-70% across datasets, including (29%) and prior (57%), yet causation remains correlative, not deterministic—many with comparable issues never attack. Extremist-driven cases, such as anarchist Gaetano Bresci's killing of King Umberto I in 1900 amid perceived tyranny, blend with personal alienation, while opportunists exploit chaos for gain, though rarer in targeted political hits. State-sponsored assassins, by contrast, often lack these pathologies, selected for emotional stability and tactical competence, as in historical operations by intelligence agencies where perpetrators undergo psychological vetting to ensure reliability under stress. Overall, these profiles emphasize environmental triggers amplifying latent vulnerabilities, with prevention hinging on disrupting the attack pathway through threat assessment rather than profiling.

Impacts on Targets, Perpetrators, and Society

Assassinations typically result in the immediate death of the target, a prominent political or public figure, disrupting leadership continuity and often precipitating power transitions that can exacerbate instability. For instance, empirical analysis of leader assassinations from 1875 to 2004 indicates that successful killings frequently lead to institutional changes, though these are more pronounced in autocratic regimes where succession battles intensify internal conflicts. In democratic contexts, the death prompts constitutional mechanisms for replacement, but the sudden vacuum can alter policy trajectories, as seen in cases where successors pursue divergent agendas from the deceased leader. Perpetrators of assassinations, often individuals or small groups driven by ideological or personal motives, face severe repercussions post-act, including capture, execution, or death during flight, with over half exhibiting prior criminal involvement that may facilitate but not guarantee evasion. Historical patterns reveal that successful assassins rarely achieve long-term evasion; for example, data on political killings show that state responses prioritize rapid neutralization, leading to trials or summary justice that deter emulation but sometimes elevate the perpetrator to martyr status among fringe supporters. Psychologically, many perpetrators experience fleeting notoriety or delusional fulfillment, yet empirical reviews link such acts to underlying social isolation or fanaticism rather than strategic success, with failed attempts amplifying personal ruin without societal gain. On , assassinations induce short-term psychological distress, including widespread , heightened polarization, and eroded trust in institutions, as evidenced by spikes in public anxiety following high-profile events like the 2024 attempt on a U.S. political figure. Long-term, empirical studies across municipalities reveal reduced in affected areas, signaling disillusionment and withdrawal from , while broader analyses find limited alteration in policy or , often entrenching incumbents or provoking retaliatory . In contexts of pre-existing , such acts correlate with escalated unrest rather than resolution, underscoring causal realism where targeted killings amplify divisions without addressing root grievances. Overall, quantitative assessments from 1875 onward demonstrate that assassinations seldom shift national trajectories durably, frequently yielding unintended boomerangs like strengthened security apparatuses or radicalized oppositions.

Tyrannicide and Moral Justifiability

Tyrannicide refers to the act of killing a ruler deemed a tyrant, typically by a private individual motivated by the perceived common good rather than personal gain. This concept has roots in classical antiquity, where philosophers like Aristotle classified tyranny as the most corrupt regime, characterized by arbitrary rule for the ruler's benefit alone, justifying resistance to restore constitutional order. Cicero, in De Officiis, argued that tyrants inevitably face assassination and that such killings do not constitute murder, as they target those who violate natural law and communal justice. In medieval thought, Thomas Aquinas provided a nuanced defense, analogizing tyrannicide to capital punishment or just war when a ruler's actions cause greater harm than removal, provided it serves the common good and minimizes broader disorder. Aquinas emphasized that tyrants often arise as divine punishment for societal sins, but extreme oppression—such as confiscating property or lives without cause—warrants private action if public authorities fail, though he cautioned against precipitating anarchy. This view influenced later thinkers, including John Milton, who contended that deposing or killing a ruler who betrays subjects aligns with moral and contractual obligations of governance. Proponents of justifiability invoke first-principles reasoning: a tyrant's systematic violation of equates to ongoing , rendering lethal or communal protection legitimate, akin to eliminating a criminal . However, critics highlight subjective identification of tyranny, risking cycles of vengeance, and the erosion of legal processes, which could destabilize societies more than the tyranny itself. Catholic , post-Aquinas, generally condemns private , prioritizing or communal judgment to avoid scandal and uphold order. Empirically, tyrannicide seldom yields lasting liberty; the assassination of Julius Caesar in 44 BCE, hailed by conspirators as liberating Rome, instead triggered civil wars culminating in Augustus's autocracy, entrenching imperial tyranny. Similar patterns appear in cases like the 2011 killing of Muammar Gaddafi, which ended his rule but unleashed factional violence and state failure in Libya, underscoring that systemic tyrannies persist due to institutional voids rather than individual leaders alone. Causal analysis reveals that without robust alternatives—such as prepared constitutional mechanisms—tyrannicide often amplifies power vacuums, inviting worse successors or chaos over reform. Thus, while philosophically defensible in theory, its practical moral weight diminishes absent evidence of net positive outcomes.

International Law, Sovereignty, and Prohibitions

International law prohibits assassination as a violation of state and fundamental norms against treacherous killing, particularly when targeting such as heads of state or officials outside armed conflict. The Charter's Article 2(4) mandates that states refrain from the threat or against the territorial integrity or political independence of any state, rendering extraterritorial assassinations—conducted without consent or under color of lawful intervention—a breach of this core principle. Such acts infringe by substituting a foreign entity's judgment for the target state's authority over its territory and leaders, potentially destabilizing international order without Security Council authorization. Customary international humanitarian law further bans murder and violence to life against civilians or persons hors de combat, with assassination often equated to perfidious killing prohibited under rules like those in the Hague Regulations (Article 23(b)), which forbid "assassination, proscription, or outlawry" in warfare. In peacetime, this extends to a near-absolute prohibition on state-sponsored targeted killings of foreign political figures, as they lack the justification of active hostilities and constitute extrajudicial execution rather than lawful combat operations. Historical state practice reinforces this norm, viewing assassination as "treacherous murder" incompatible with diplomatic norms and reciprocal protections for leaders. Domestic policies reflect these prohibitions; for instance, United States , issued by President Reagan on December 4, 1981, explicitly bars any U.S. government employee or agent from engaging in or conspiring to commit assassination, defining it as the premeditated killing of a protected person treacherously for political purposes. This order, reaffirmed across administrations, aligns with international obligations but carves potential exceptions for under UN Charter Article 51, though applications like drone strikes against non-state actors in sovereign territories (e.g., or ) have sparked debates over compliance, with critics arguing they erode absent imminent threats or host-state consent. Empirical cases, such as the 2020 U.S. strike on Iranian General in , illustrate tensions: justified domestically as preemptive but condemned internationally as a sovereignty violation without UN endorsement. Prohibitions are not ironclad in non-international armed conflicts or against terrorists, where some states invoke anticipatory , but demands proportionality and distinction to avoid conflating lawful targeting with assassination's element. Violations risk escalation, as reciprocal assassinations undermine mutual deterrence among states, historically prompting treaties like the 1930s efforts to codify bans, though enforcement remains weak absent or . Overall, these frameworks prioritize sovereignty's stability over unilateral retribution, with empirical evidence showing assassinations rarely achieve strategic goals without provoking broader conflict.

Empirical Effectiveness and Unintended Consequences

Empirical analyses of assassination attempts reveal limited overall effectiveness in achieving intended political or policy objectives. A comprehensive study of 298 attempts on national leaders from 1875 to 2004 found a success rate of approximately 20 percent, with successful killings of autocratic rulers increasing the probability of democratization by 13 percentage points in the subsequent year compared to failed attempts, an effect persisting for at least a decade. This institutional shift occurred primarily through regular leadership transitions, rising 19 percentage points post-success in autocracies, but showed no comparable impact in democracies or on specific policy alterations. However, such outcomes remain rare, as most attempts fail, often entrenching the targeted regime through heightened repression. Broader datasets underscore the frequent failure to realize assassins' goals, with assassinations more likely to destabilize than reform. An examination of 758 attacks from 1946 to 2013 documented 954 deaths of political figures, revealing that killings of heads of state in authoritarian contexts occasionally spurred economic gains but predominantly escalated and regime fragmentation, undermining democratic participation and bolstering executive overreach. Opposition leader assassinations heightened unrest without systemic policy shifts, while targets yielded minimal targeted changes, suggesting assassinations rarely deliver precise causal leverage over entrenched power structures. In wartime scenarios, successes intensified moderate conflicts by 33 percentage points while weakly shortening large-scale ones, indicating inconsistent influence on conflict dynamics. Unintended consequences frequently outweigh any targeted gains, fostering backlash, escalation, and alternative trajectories. Historical patterns show assassinations creating power vacuums that invite radical successors or civil strife, as seen in the 1914 killing of Archduke Franz Ferdinand, which precipitated World War I rather than resolving Austro-Hungarian tensions. Similarly, the 1984 assassination of Indian Prime Minister Indira Gandhi by Sikh bodyguards triggered widespread anti-Sikh pogroms, killing thousands and deepening communal divides without advancing the perpetrators' separatist aims. Targeted killings, including state-sponsored ones like Israel's operations against militant leaders, often elevate martyrs, radicalize followers, and provoke reprisals, perpetuating cycles of violence over resolution. These dynamics highlight causal realism: removing a leader disrupts equilibria but rarely predicts successor behavior or societal responses, amplifying instability in contexts prone to factional competition.

Prevention and Countermeasures

Historical Responses and Failures

In , the on March 15, 44 BCE, exemplified early failures in personal security for leaders. Caesar dismissed his Spanish bodyguard upon entering the city and ignored warnings of plots, entering the unprotected where senators stabbed him 23 times. This overconfidence and lack of immediate protection enabled the conspirators, leading to immediate civil unrest rather than stable preventive reforms; the response involved proscriptions and wars that consolidated power under Octavian rather than enhancing security protocols. During the American Civil War's aftermath, Abraham Lincoln's assassination on April 14, 1865, highlighted rudimentary security shortcomings. No dedicated presidential protection agency existed; Lincoln had signed legislation creating that day for counterfeiting investigations, not personal guarding. His assigned guard, Officer , abandoned his post outside the presidential box at to drink at a saloon and failed to inspect entrants, allowing unrestricted access to shoot Lincoln at point-blank range. Parker faced no immediate dismissal or charges, underscoring lax accountability. Similar lapses persisted, as seen in President James A. Garfield's shooting on July 2, 1881, by Charles Guiteau in a Washington train station amid crowds, with no systematic barriers or advance threat assessment. Garfield lingered for 80 days before dying, prompting public outcry but delayed reforms; it was President William McKinley's assassination on September 6, 1901, that finally led Congress to authorize Secret Service presidential protection on February 28, 1902. These events reveal a pattern of reactive responses—formalizing guards only after repeated failures—driven by complacency in stable periods and inadequate vetting of proximate threats. The assassination of Archduke Franz Ferdinand on June 28, 1914, in Sarajevo demonstrated operational and intelligence failures despite prior alerts. Austrian authorities received warnings of Serbian nationalist plots but failed to secure the motorcade route adequately; the driver's wrong turn halted the vehicle directly beside assassin Gavrilo Princip after an earlier bomb attempt, with bodyguards not intervening promptly. Princip fired two shots, killing Ferdinand and his wife, due to these lapses including unheeded intelligence and poor tactical execution. The imperial response focused on military mobilization rather than internal security overhauls, escalating into World War I without addressing systemic vulnerabilities like route planning and real-time vigilance. Across these cases, historical prevention efforts faltered from absent dedicated agencies, guard dereliction, ignored intelligence, and post-incident priorities favoring retribution over protocol enhancement, often requiring multiple tragedies to spur incremental improvements like formalized protection details. Empirical patterns indicate that assassinations succeeded in about 25-30% of attempts on leaders from 1875 onward, frequently due to such preventable errors rather than inevitable risks.

Modern Intelligence, Security, and Policy Frameworks

In the United States, the U.S. Secret Service leads modern protective intelligence efforts through its National Threat Assessment Center, which focuses on behavioral analysis to identify individuals exhibiting grievance-based violence or fixation on public figures, drawing from databases, social media monitoring, and inter-agency coordination to disrupt plots before execution. This framework evolved post-1963 with the integration of mental health evaluations and post-1981 Reagan attempt reforms emphasizing advance site surveys and counter-sniper teams. Following the July 13, 2024, attempt on former President Donald Trump at a rally in Butler, Pennsylvania—where lapses included unaddressed line-of-sight vulnerabilities and denied resource requests—the agency implemented 21 of 40 recommended changes by mid-2025, including bolstered drone detection, real-time video analytics, and a new "protective model" prioritizing former presidents' security parity with incumbents. Globally, analogous agencies like the UK's Specialist Protection Command and Israel's employ layered security perimeters, electronic countermeasures, and networks tailored to urban mobility threats, informed by empirical data from incidents such as the 2022 killing of chief's advisor. Policy frameworks reinforce these via domestic laws, such as U.S. 18 U.S.C. § 1751 criminalizing assaults on presidents, and international norms under prohibiting peacetime assassinations of heads of state as violations of , though lacking binding enforcement mechanisms beyond UN Charter Article 2(4) against threats to territorial integrity. distinctions persist in armed conflicts under , permitting strikes on s but excluding political figures absent combatant status. Technological integrations, including AI for predictive threat modeling and facial recognition in surveillance feeds, have advanced counter-assassination capabilities since the 2010s, enabling anomaly detection in crowd data and geospatial tracking of suspicious actors. However, empirical reviews of recent failures, such as unmitigated insider threats and communication breakdowns in the 2024 Trump case, underscore persistent gaps in human oversight and resource allocation, with a mid-2024 surge in executive-targeted killings prompting calls for cross-border intelligence sharing protocols. These frameworks prioritize causal disruption of pathways—ideation, planning, access—over reactive measures, yet data indicate that only a fraction of assessed threats materialize into attempts, necessitating refined triage to avoid overreach.

References

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