In September 1961, the Fantastic Four debuted in their own title (cover dated November), and they were not just a hit, they were an absolute smash!! Marvel followed this with the introduction of a most unlikely superhero with the Incredible Hulk #1 (cover dated May 1962), followed by most likely the second most famous comic book superhero of all time with Spider-Man in Amazing Fantasy #15 (cover dated August 1962).
illustration: Fantastic Four #1
A nerdish teenager with real teenage troubles had been bitten by a radioactive spider, transforming him into a freak able to climb walls by sticking his fingers to it and with the strength of fifty men.
Jack Kirby and Steve Ditko had helped jump start Marvel. The company which had almost gone the way of the Studebaker was on the verge of becoming one of the most profitable, influential and popular comic companies ever in just a few short months, and Kirby was just getting warmed up.
In the next two years Jack Kirby and Stan Lee would introduce scores of heroes from the Giant Man and the Mighty Thor to taking a note from DC and reintroducing the Sub-Mariner and the legendary Captain America.
But what really propelled Marvel was an entirely new ingredient.
When Superman donned his cape, he never intimated that he didn't want to be a superhero. As a matter of fact he was intended to be a superhero was your impression of him. Batman only didn't want to be a superhero because he only became a hero after his parents were murdered. These heroes weren't beset by the troubles real people had in general. I always looked at superheroes as being entertainers.
But the Marvel heroes were different. they were beset by all nature of human malady. The thing didn't want to be an ugly monster, Bruce Banner didn't want to change into the Hulk and poor Peter Parker was always looking out for his Aunt May's health. Spider-Man may be the most obvious example of the soap operatic comic continuity. He was at first in high school, then college over the years and grew from a bespectacled teenager to a mature man (shades of Gasoline Alley), which is in itself unlike any superhero before him.