As an adolescent, Spider-Man was what got me through tough times in terms of being a skinny kid.
I think it has other roots, has to do, in part, with a general anxiety in contemporary life... nuclear bombs, inequality of possibility and chance, inequality of goods allotted to us, a kind of general racist, unjust attitude that is pervasive.
He would still see it as his duty to shut up and get on with it, not cause any trouble. In our own time we've made a hero of the rebel, and it's more heroic to speak up.

