Creation Story
Green Goblin was Steve Ditko’s creation in concept and design. Ditko developed the visual character (green skin, purple costume, goblin-themed goggles, bat-winged glider) during the Spider-Man run and pushed for a costume design with explicitly horror-adjacent imagery rather than the science-fiction villain archetypes the early Spider-Man book had been using. Stan Lee scripted Amazing Spider-Man #14 (July 1964). The debut is the character in full costume attacking Spider-Man without the Goblin’s face revealed; readers see goblin-mask, cape, glider, and the laughing verbal tic, but not the face underneath.
The decision to conceal the identity through multiple appearances was part of the editorial plan. Ditko wanted the reveal to be a specific character readers had already met; Lee wanted the reveal to be more dramatic. The tension between Lee and Ditko over the Goblin’s identity was one of several factors in Ditko’s 1966 departure from Marvel.
John Romita Sr. took over as Spider-Man penciller with Amazing Spider-Man #39 (August 1966) and the issue unmasked the Goblin in the story’s final pages: Norman Osborn, father of Peter Parker’s best friend Harry Osborn. Romita’s first Spider-Man issue is also the Osborn reveal and a secondary Silver Age key.
The death of Gwen Stacy
Amazing Spider-Man #121 (June 1973) by Gerry Conway and Gil Kane is the single most consequential comic book of the Bronze Age. Green Goblin throws Gwen Stacy from the Brooklyn Bridge; Spider-Man catches her; the catch either breaks her neck or the Goblin has already killed her (Conway has gone back and forth in interviews). The issue’s effect on mainstream comics was immediate. Supporting characters in superhero books had not died before. After #121, they could. The assumption of safety that had defined Silver Age Marvel’s supporting-cast physics was gone.
Amazing Spider-Man #122 (July 1973) killed Norman Osborn in the follow-up. Osborn stayed dead for 23 years of publishing time until the Clone Saga (1996) revealed he had survived and was masterminding the entire arc.
The Dark Reign era
Dark Reign (2009) marked Norman Osborn’s ascension to public power. Following the Secret Invasion event, Osborn becomes director of H.A.M.M.E.R. (the post-S.H.I.E.L.D. security apparatus), forms the Dark Avengers (Venom impersonating Spider-Man, Bullseye as Hawkeye, Daken as Wolverine, and Osborn himself in a customized Iron Man armor as Iron Patriot), and operates as the most powerful figure in the Marvel Universe. The arc runs through most of 2009 and concludes in Siege (2010) by Brian Michael Bendis and Olivier Coipel.
Collector context
Amazing Spider-Man #14 is the Green Goblin key and a Silver Age Marvel book with compounded collector demand (first Goblin, first Hulk in ASM, first Enforcers). Amazing Spider-Man #39 (Norman Osborn reveal, Romita’s first) is a secondary key. Amazing Spider-Man #121 (Death of Gwen Stacy) is both a Spider-Man key and a Green Goblin key; it trades as one of the most important Bronze Age Marvel books alongside Giant-Size X-Men #1 and Hulk #181.