The worker of the world has nothing to lose, but their chains, workers of the world unite.

The meaning of peace is the absence of opposition to socialism.

Capital is reckless of the health or length of life of the laborer, unless under compulsion from society.

If anything is certain, it is that I myself am not a Marxist.

Men's ideas are the most direct emanations of their material state.

The ideas of the ruling class are in every epoch the ruling ideas, i.e., the class which is the ruling material force of society, is at the same time its ruling intellectual force.

From each according to his ability to each according to his need.

The ruling ideas of each age have ever been the ideas of its ruling class.