The advent of Superman and his imitators marked the beginning of the Golden Age of Comic Books. The Golden Age starts in the late 1930s and ends in the late 1940s when superheroes began to fade away.
-"Comic Book Culture", Ron Goulart
E.C. Segar's Popeye made his debut January 17,1929 as a nameless sailor in King Feature's Thimble Theatre comic strip in the New York Journal.
-Popeye.com