The X-Men are a fictional superhero team appearing in Marvel Comics, created by writer Stan Lee and artist Jack Kirby. They first appeared in X-Men #1 in 1963. The team consists of mutants, individuals born with superhuman abilities, who fight for peace and equality between humans and mutants. Led by Professor X, they often face adversaries like Magneto and his Brotherhood of Evil Mutants. The X-Men's stories explore themes of prejudice, identity, and acceptance, making them a significant part of popular culture. Over the years, they have been adapted into various media, including animated series, films, and video games, further expanding their influence and fanbase.