"The original seven members of the Justice League of America, as defined by their introduction in 'The Brave and the Bold' #28."
©DC Comics
Debuting in The Brave and the Bold #28 (February/March 1960), the Justice League of America was writer Gardner Fox’s updated interpretation of the Justice Society of America of the 1940s. The Justice League originally consisted of Superman, Batman, Wonder Woman, Flash, Green Lantern, Martian Manhunter, and Aquaman, but also featured Green Arrow, Hawkman, Atom, Black Canary, Red Tornado, Hawkgirl, Zatanna, and Firestorm, among many others.
Though the Justice League premise was highly unlikely, since each superhero would have to travel from faraway locations regularly to meet other superheroes in one spot, the Justice League of America proved to be very successful, spawning numerous comic books and animated television series, such as Hanna-Barbera's Super Friends.