Pre-crime (or precrime) is the idea that the occurrence of a crime can be anticipated before it happens. The term was coined by science fiction author Philip K. Dick, and is increasingly used in academic literature to describe and criticise the tendency in criminal justice systems to focus on crimes not yet committed. Precrime intervenes to punish, disrupt, incapacitate or restrict those deemed to embody future crime threats. The term precrime embodies a temporal paradox, suggesting both that a crime has not yet occurred and that it is a foregone conclusion.

George Orwell introduced a similar concept in his 1949 novel Nineteen Eighty-Four using the term thoughtcrime to describe illegal thoughts which held banned opinions about the ruling government or intentions to act against it. A large part of how it differs from precrime is in its absolute prohibition of anti-authority ideas and emotions, regardless of the consideration of any physical revolutionary acts. However, Orwell was describing behaviour he saw in governments of his day as well as extrapolating on that behaviour, and so his ideas were themselves rooted in real political history and current events.

In Philip K. Dick's 1956 science fiction short story "The Minority Report", Precrime is the name of a criminal justice agency, the task of which is to identify and eliminate persons who will commit crimes in the future. The agency's work is based on the existence of "precog mutants", a trio of "vegetable-like" humans whose "every incoherent utterance" is analyzed by a punch card computer. As Anderton, the chief of the Precrime agency, explains the advantages of this procedure: "in our society we have no major crimes ... but we do have a detention camp full of would-be criminals". He cautions about the basic legal drawback to precrime methodology: "We're taking in individuals who have broken no law."

The concept was brought to wider public attention by Steven Spielberg's film Minority Report, loosely adapted from the story. The Japanese cyberpunk anime television series Psycho-Pass has a similar concept.

Precrime in criminology dates back to the positivist school in the late 19th century, especially to Cesare Lombroso's idea that there are "born criminals", who can be recognized, even before they have committed any crime, on the basis of certain physical characteristics. Biological, psychological and sociological forms of criminological positivisms informed criminal policy in the early 20th century. For born criminals, criminal psychopaths, and dangerous habitual offenders eliminatory penalties (capital punishment, indefinite confinement, castration etc.) were seen as appropriate.^{[full citation needed]} Similar ideas were advocated by the social defense movement and, more recently, by what is seen and criticized as an emerging "new criminology" or "actuary justice". The new "precrime" or "security society" requires a radically new criminology.

Richard Nixon's psychiatrist, Arnold Hutschnecker, suggested, in a memorandum to the president, to run mass tests of "pre-delinquency" and put those juveniles in "camps". Hutschnecker, a refugee from Nazi Germany and a vocal critic of Hitler at the time of his exodus, has rejected the interpretation of the memorandum that he advocated concentration camps:

It was the term camp that was distorted. My use of it dates back to when I came to the United States in 1936 and spent the summer as a doctor in a children's camp. It was that experience and the pastoral setting, as well as the activities, that prompted my use of the word "camp."

The frontline of a modern criminal justice system is increasingly preoccupied with anticipating threats, and is the antithesis of the traditional criminal justice system's focus on past crimes.^{[page needed]} Traditionally, criminal justice and punishment presuppose evidence of a crime being committed. This time-honored principle is violated once punishment is meted out "for crimes never committed". An example of this trend in the first decade of the twenty-first century is "nachträgliche Sicherungsverwahrung" ('retrospective security detention'), which became an option in German criminal law in 2004. This "measure of security" can be decided upon at the end of a prison sentence on a purely predictive basis.^{[full citation needed]} In France, a similarly predictive measure was introduced in 2008 as "rétention de sûreté" (security detention). The German measure was viewed as violating the European Convention on Human Rights by the European Court of Human Rights in 2009. As of 2014^[update], the German law was still partly active in Germany and new legislation was planned for continuing the pre-crime law under the new name "Therapieunterbringung" (detention for therapy). A similar provision for indefinite administrative detention was found in Finnish law, but it was not enforced after the mid-1970s. Precrime is most obvious and advanced in the context of counter-terrorism, though it is argued that, far from countering terrorism, precrime produces the futures it purports to prevent.