There are so many people we just never hear about because the grade schools in America are set up to prevent us from learning anything useful. People who are monumental to culture and activist movements will just not be covered at all. People like Lenny Bruce.
I don't know anything about him yet, really, except that he was a comedian, he pushed the limits of free speech, the government hated him, the political police of the U.S. government - the FBI - tracked and terrorized him, and that means he was probably doing something very important and very right.
Looks like there are a lot of books out there - a lot of material about Bruce - but here is one that seems to be pretty good. And a quote about the book:
Lenny Bruce opened the doors for all the guys like me; he prefigured the free-speech movement and helped push the culture forward into the light of open and honest expression. I thought I knew his story pretty well, but I learned a great deal from this book. It is a major contribution toward understanding the threat perceived by the “powers” from simple artistic honesty.