If you are not familiar with his work, please do some research. The author of "People's History of the United States" passed away last night at the age of 87.
He loved free thinking, he loved independent publishing, he loved challenging the status quo. He was a hero to the underground, and an annoyance to the ruling class. He wrote tons of books, released a number of audio CDs. Much has been written and said ABOUT him as well.
If you don't know his stuff, you should.
RIP, Howard Zinn.