Arguably, Iron Man has the coolest costume out of all the comic universes, because it's both beautiful and functional. It's not just the little kids who want to grow up to be Iron Man, even grown men would love to fly around and shoot at stuff. If the Iron Man suit was real, people would sell anything they could to purchase it, because it turns an ordinary guy into a powerful superhero with the strength and firepower to defeat a whole army of superhumans.
Today's comic books are descendants of 19th-century "penny dreadful" serials. They were multi-part sensational stories printed on cheap paper and sold for, what else, a penny each. These stories became popular among the lower and working classes. They couldn't afford and weren't interested in, the "important" literary novels of the day. Penny dreadfuls and the "dime novels" that followed them had clear-cut good-vs.-evil themes. And they weren't short on action or melodrama, either! By the early 20th century, we had such enduring characters as Tarzan and Zorro in "pulp" fiction. (So-called because of the inexpensive paper on which it was printed.) The first of the modern superheroes was Superman, who launched the Golden Age of Comics in 1938.
By the end of the 1940s, superheroes had lost a lot of their appeal to the public. National Comics (now DC Comics) went from having dozens of superhero titles to only having a handful. Most of the members of the Justice Society of America fell out of sight in the world of National. Flash and Green Lantern went from appearing in multiple titles to not appearing in any books at all!
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