Amazing Fantasy #15
Peter Parker, a shy high school student in Queens, is bitten by a radioactive spider during a class field trip and develops superhuman strength, agility, and the ability to cling to walls. He initially uses his new powers selfishly and for profit, but when his inaction allows a criminal to escape — who then murders his beloved Uncle Ben — he is traumatized into dedicating his life to heroism. The story ends in tragedy rather than triumph.
Amazing Fantasy #15 created the first truly relatable teenage superhero — a working-class kid defined by failure, guilt, and social anxiety rather than competence and confidence — establishing a template that became the dominant mode of superhero storytelling. The moral of "power and responsibility" is the most cited ethical framework in comic book history. Spider-Man became Marvel's mascot and the best-selling superhero character of all time.
Stan Lee was told by his publisher that a teenage superhero was a terrible idea — teenagers were sidekicks, not leads. Lee placed the character in Amazing Fantasy, a soon-to-be-cancelled anthology, as a last-resort experiment. The issue sold so well that Spider-Man received his own series, and Lee used the anecdote to argue for the importance of editor-defying creative intuition throughout his career.
Dr. Fredric Wertham's book "Seduction of the Innocent" triggered a Senate investigation that led to the self-regulatory Comics Code Authority, effectively ending horror, crime, and romance comics and consolidating the market around Code-approved superhero and Western stories. The vacuum left by these dead genres was eventually filled by the underground comix movement of the late 1960s.