The Amazing Spider-Man #121

The Amazing Spider-Man #121, published in 1973, represents a pivotal turning point in American comic book history, marking the conclusion of the Silver Age and the beginning of a more mature, consequence-driven approach to superhero narratives. Written by Gerry Conway with art by Gil Kane and John Romita Sr., the issue is famously titled 'The Night Gwen Stacy Died.' It was created during a period when editors and writers at Marvel sought to inject higher stakes into the medium, ultimately deciding that the death of a major supporting character would force Peter Parker to experience a loss that defined his adult life.

The design of the issue, particularly the iconic cover by John Romita Sr., emphasizes the suddenness and tragedy of the event. The decision to kill Gwen Stacy was controversial at the time, as audiences were accustomed to the safety of status quo storytelling. Despite the initial backlash from readers who felt the character's death was premature or unnecessary, the issue is now widely regarded as one of the most significant moments in Marvel's history, as it fundamentally altered the trajectory of the Spider-Man mythos and established the expectation that comic book protagonists should face genuine, irreversible personal tragedies.