Friedrich Engels

Freedom is the recognition of necessity.

The proletariat uses the State not in the interests of freedom but in order to hold down its adversaries, and as soon as it becomes possible to speak of freedom the State as such ceases to exist.

The state is not abolished, it withers away.

Everything must justify its existence before the judgment seat of Reason, or give up existence.

Just as Darwin discovered the law of development of organic nature, so Marx discovered the law of development of human history: the simple fact, hitherto concealed by an overgrowth of ideology, that mankind must first of all eat, drink, have shelter and clothing, before it can pursue politics, science, art, religion, etc.

All history has been a history of class struggles between dominated classes at various stages of social development.