Friedrich Engels — "The whole of history is nothing but the continuous transformation of human natur…"

"The modern bourgeois society that has sprouted from the ruins of feudal society has not done away with class antagonisms. It has but established new classes, new conditions of oppression, new forms of…"

"Life is movement, and movement is life."

"The whole history of mankind (since the dissolution of primitive tribal society, holding land in common ownership) has been a history of class struggles, contests between exploiting and exploited, rul…"

"But the revolution is not merely a question of seizing power; it is also a question of radically transforming the whole of society, of creating new social relations and a new morality."

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