The social system grows rigid but the productive forces continue to expand, and conflict ensues between the forces of production and the social conditions of production.
I have opposed the Communist cold war line ever since, both by public utterance and by private help to trade unionists breaking free from the Communist influence.
This radical transformation of world power relationships reflects primarily in the case of both the USA and the USSR the growth of the productive forces.
The stage of the development of the productive forces determines the political and ideological superstructure of society which are crystallized into a system of social organization.
Socialism is nothing more nor less than the social, political and ideological system which breaks the fetters upon economic growth created under capitalism and opens the way to a new period of economic and social expansion on a much larger scale.
Because capitalist society has expanded the productive forces so enormously, the social conditions under which it arose lag behind and become fetters holding back the further growth of productive forces.