"Since civilisation is founded on the exploitation of one class by another class, its whole development proceeds in a constant contradiction.
Basing himself on the research of anthropologist Lewis Henry Morgan, Friedrich Engels.
Every step forward in production is at the same time a step backward in the position of the oppressed class, that is, of the great majority." First published in 1884, The Origin of the Family is one of the most important works of Marxist theory. "Since civilisation is founded on the exploitation of one class by another class, its whole development proceeds in a constant contradiction