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

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

History does nothing, possesses no enormous wealth, fights no battles. It is rather man, the real, living man, who does everything, possesses, fights. It is not History, as if she were a person apart, who uses men as a means to work out her purposes, but history itself is nothing but the activity of men pursuing their purposes.

Natural science will in time incorporate into itself the science of man, just as the science of man will incorporate into itself natural science: there will be one science.

A people without a heritage are easily persuaded.

[Napoleon] swept away everywhere the establishments of feudality. ... [He was] Caesar himself.

Without doubt, machinery has greatly increased the number of well-to-do idlers.