Topic: class contradiction

Every communist must understand the three stages of development of the universal theory of proletarian revolution: Marxism, Leninism and Maoism; and learn the basic principles of Marxism-Leninism-Maoism in materialist philosophy, political economy, social science, party building, strategy and tactics and opposing revisionism in socialist society.

As background, let me cite the fact that in the Communist Manifesto of 1848, Marx and Engels had already differentiated Scientific Socialism from Utopian Socialism of three kinds: