Marxist Origins of Communism, I

This talk about free selling and buying, and all the other "brave words" of our bourgeoisie about freedom in general, have a meaning, if any, only in contrast with restricted selling and buying, with the fettered traders of the Middle Ages, but have no meaning when opposed to the Communistic abolition of buying and selling, of the bourgeois conditions of production, and of the bourgeoisie itself.
Manifesto of the Communist Party

Even the most cursory student of Communism is familiar with the seminal role of Karl Marx in the development of Communist ideology. The practical results of Communist revolutions have been so dreadful that Marx scholars have been at pains to point out the numerous doctrinal points on which Communist revolutionaries came to deviate from the teachings of Marx. Yet on an important collection of fundamental issues, the profound influence of Marx on Communist theory and practice is easy to detect.