I would read even more recent stuff. I agree on Che. How about reading about Kevin Kelly and Louis Rossetto? Bob Hunter created Greenpeace out of nothing. Petraeus revolutionized the most powerful military in the history of the world. It's through a mix of ancient literature, philosophy and political economics that one gains perspective on human nature. And human nature does not, has not, and will not change. But the structure of the world evolves, making modern revolutionaries much more interesting. When I know what Kolakowski had to say about Marxism, I'm going to go move past Marx and spend more time on Popper who hasn't really been rebutted (to my knowledge) yet.
Kolakowski -> http://www.economist.com/obituary/displaystory.cfm?story_id=...