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

"The development of modern industry, therefore, cuts from under its feet the very foundation on which the bourgeoisie produces and appropriates products. What the bourgeoisie therefore produces, above …"

"The free development of each is the condition for the free development of all."

"The mode of production of material life conditions the general process of social, political and intellectual life. It is not the consciousness of men that determines their existence, but their social …"

"Necessity is blind until it becomes conscious. Freedom is the consciousness of necessity."