Karl Marx was in favor of socialist and communist-socialist revolutions, but he had a pretty nuanced view about it.

When I was a sophomore at USC, I was a socialist, pretty much to the left. But not when I left the university. I quickly got wise. I’d read about what had happened to Russia in 1917 when the Communists took over.

The history of all previous societies has been the history of class struggles.

Revolutions go not backward.

And so I have studied, I have to tell you, revolutions and uprisings for a long time. They are all slightly different, but what they all look for is some kind of a mechanism to go from an authoritarian system to an open, democratic system.

I have been ever of opinion that revolutions are not to be evaded.

From each according to his abilities, to each according to his needs.

I believe Karl Marx could have subscribed to the Sermon on the Mount.

Capital is dead labor, which, vampire-like, lives only by sucking living labor, and lives the more, the more labor it sucks.

It is a quality of revolutions not to go by old lines or old laws, but to break up both and make new ones.

The Catholic and the Communist are alike in assuming that an opponent cannot be both honest and intelligent.

There is a specter haunting Europe, the specter of Communism.

Revolutions are the locomotives of history.

No member of our generation who wasn’t a Communist or a dropout in the thirties is worth a damn.

Religion is the opium of the masses.