One of the most distinctive traits of communist countries was an existence of a state ideology, the most prominent of which was the Soviet Marxism-Leninism. The state ideology claimed to be a scientific theory, which explains the nature of historical processes and proves why socialism will ultimately be victorious and capitalism will collapse. Of course, such an explanation was based on a number of classical works, which shaped the ideology in the philosophical system. Every student of Marxism-Leninism, for example, knew its basic postulates: History is driven by economy, and economic value is created solely by labor, not by capital.