Change comes about as a result of the contradiction between the forces and the relations of production. In the course of the development of the production forces, a stage is reached at which these forces become destructive. They are destructive because they contradict existing relationships of production. Society is unable to absorb its own production because of capitalistic appropriation of social production- production expands more rapidly than markets. Contradiction between forces of production and relations of production is manifested in class conflict.
All history is history of class struggles.
One class rules at expense of others. Poverty and alienation result. Outcome of contradiction is revolution. If revolution is to succeed, must be a genuine social revolution as well as political one 7.