X-Men #1

X-Men #1 was published by Marvel Comics in September 1963, marking the debut of a superhero team created by Stan Lee and Jack Kirby. Conceived during the rapid expansion of the Marvel Universe, the title introduced a group of young mutants led by Professor Charles Xavier, reflecting the social anxieties and thematic explorations of difference and prejudice that would define the franchise for decades. The issue established the foundational contrast between the X-Men’s efforts to integrate into human society and the militant separatist philosophy of their antagonist, Magneto.

Jack Kirby provided the iconic cover art and interior pencils, while Stan Lee authored the script. The design of the original costumes and the team's central dynamic were intended to differentiate the book from Marvel's other prominent groups like the Fantastic Four. Upon its release, the issue received a modest reception, as the concept took several years to gain significant commercial momentum. It is now considered a landmark of the Silver Age of comic books, celebrated for its enduring impact on popular culture and its role in launching one of the most prolific series in comic history.