Wolverine was introduced in 1974 at the end of Incredible Hulk #180 by the late, great Len Wein & Herb Trimpe, inserting himself into a battle between the Hulk and the Wendigo. A Canadian secret agent, codenamed Weapon X, Wolverine spent issue #181 fighting both Hulk and Wendigo, failing to stop either one. A year later, Wein used him as part of his new team of X-Men introduced in Giant-Size X-Men #1, and he quickly became the most popular of those new characters; his combination of snotty-brawler personality, tendency to explosive violence, and mysterious past proved to be incredibly compelling, particularly in the hands of Wein’s successor, Chris Claremont, and his longtime collaborator, Canadian artist/co-plotter John Byrne. He became Marvel’s most popular character, matching, if not supplanting, Spider-Man as the company’s flagship hero in the latter two decades of the 20th century.
When the X-Men hit the big screen in 2000, the character did likewise for the growing series of X-films.