Friedrich Engels — "The modern individual family is founded on the open or concealed domestic slaver…"

"The conditions of life of the proletariat are therefore the conditions of life of humanity today."

"All that is solid melts into air, all that is holy is profaned, and man is at last compelled to face with sober senses his real conditions of life, and his relations with his kind."

"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…"

"All that is solid melts into air."

"The old society, with its classes and class antagonisms, is to be replaced by an association, in which the free development of each is the condition for the free development of all."