Marvel Universe

The Marvel Universe is a fictional shared universe where the stories in most American comic book titles and other media published by Marvel Comics take place. Superhero teams such as the Avengers, the X-Men, the Fantastic Four, the Guardians of the Galaxy, and many Marvel superheroes live in this universe, including characters such as Spider-Man, Wolverine, Iron Man, Captain America, and Hulk. It also contains well-known supervillains such as Doctor Doom, Magneto, Green Goblin, Loki, and Thanos. It also contains antiheroes such as Deadpool, Ghost Rider, Punisher, Elektra, and Black Cat.

The Marvel Universe is further depicted as existing within a "multiverse" consisting of thousands of separate universes, all of which are the creations of Marvel Comics and all of which are, in a sense, "Marvel universes". In this context, "Marvel Universe" is taken to refer to the mainstream Marvel continuity, which is known as Earth-616 or Prime Earth.

Some of the characters in Timely Comics (the 1930s and '40s predecessor to Marvel Comics) coexisted in the same world, as first established in Marvel Mystery Comics #7 (1940) where Namor was mentioned in Human Torch's story, and vice versa. Later several superheroes (who starred in separate stories in the series up to that point) met each other in a group dubbed the All-Winners Squad.

Though the concept of a shared universe was not new or unique to comic books in 1961, writer/editor Stan Lee, together with several artists including Jack Kirby and Steve Ditko, created a series of titles where events in one book would have repercussions in another title and serialized stories would show characters' growth and change. Headline characters in one title would make cameos or guest appearances in other books. Fantastic Four #12 is the first crossover comic book in modern Marvel continuity (first meeting of Fantastic Four and the Hulk). Eventually, many of the leading heroes (Ant-Man, Wasp, Iron Man, Thor and the Hulk) assembled into a team known as the Avengers, which debuted in September 1963. This was not the first time that Marvel's characters had interacted with one another—Namor and the original Human Torch had been rivals when Marvel was Timely Comics (Marvel Vault), under editor Martin Goodman — but it was the first time that the comic book publisher's characters seemed to share a world. The Marvel Universe was also notable for setting its central titles in New York City; by contrast, many DC heroes live in fictional cities. Care was taken to portray the city and the world as realistically as possible, with the presence of superhumans affecting the common citizens in various ways.

Over time, a few Marvel Comics writers lobbied Marvel editors to incorporate the idea of a Multiverse resembling DC's parallel worlds; this plot device allows one to create several fictional universes which normally do not overlap. What happens on Earth in the main Marvel Universe would normally not affect what happens on a parallel Earth in another Marvel-created universe. However, writers would have the creative ability to write stories in which people from one such universe would visit this alternative universe.

In 1982, Marvel published the miniseries Contest of Champions, in which all of the major heroes in existence at the time were gathered together to deal with one threat. This was Marvel's first miniseries. Each issue contained biographical information on many major costumed characters; these biographies were a precursor to Marvel's series of reference material, The Official Handbook of the Marvel Universe, which followed shortly on the heels of Contest of Champions.

The Marvel Universe is strongly based on the real world. Earth in the Marvel Universe has all the features of the real one: same countries, same personalities (politicians, movie stars, etc.), same historical events (such as World War II), and so on; however, it also contains many other fictional elements: countries such as Wakanda and Latveria and organizations like the espionage agency S.H.I.E.L.D. and its enemies, Hydra and A.I.M. In 2009, Marvel officially described its world's geography in a two-part miniseries, the Marvel Atlas.

Most importantly, the Marvel Universe also incorporates examples of almost all major science fiction and fantasy concepts, with writers adding more continuously. Aliens, gods, magic, cosmic powers and extremely advanced human-developed technology all exist prominently in the Marvel Universe. Monsters also play a more prominent role with east Asian origins of magical incantation, outlandish sorcery and manifesting principle in the Marvel Universe. One such case is Fin Fang Foom arising from the ashes of tantric magic. Thanks to these extra elements, Earth in the Marvel Universe is home to a large number of superheroes and supervillains, who have gained their powers by any of these means.^{[citation needed]} The general public is so familiar with such concepts that Empire State University has a scholarship for "aliens, dimensional travelers, clones, independent machine intelligences and other students outside the norm", businesses and residences have superhero property insurance and bookmakers take bets on their battles' outcomes, and New York air traffic controllers handle starships landing at local airports.