"It is characteristic of dialectics to regard all forms of life, society and thought as being in a state of constant motion, change, transformation."

"The history of all hitherto existing society is the history of class struggles."

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

"The bourgeoisie has subjected the country to the rule of the towns. It has created enormous cities, has greatly increased the urban population as compared with the rural, and has thus rescued a consid…"

"The first class opposition that appears in history coincides with the development of the antagonism between man and woman in monogamous marriage, and the first class oppression coincides with that of …"