Green Goblin (Norman Osborn) is created by Stan Lee and Steve Ditko. The character first appeared in The Amazing Spider-Man #14, with the story called "The Grotesque Adventure Of The Green Goblin."
Green Goblin is the only Spider-Man villain that has caused Peter Parker (Spider-man) so much pain, suffering, and turmoil. Examples are, killing Gwen Stacey, finding out that Peter Parker (the perfect son that he always wanted) was really Spiderman! Time after time, Spiderman has arose to the challenge and defeat one of his greatest enemies.