In this paper, the author deals with the system of people's democracy (the political order during the first post-World War II years) in Yugoslavia, where this system was carried into effect first and to the greatest extent. It was also introduced in other East European states. It underscored its people's character (the power of the masses). The system of people's democracy had its peculiarities: it differed from bourgeois democracies, though it - at least technically - retained some elements of classical parliamentary power. E.g., the multi-party system was constitutionally guaranteed, though in practice there was a mix of party monism and pluralism. When the showdown with the opposition was completed in East European states, when the power was seized by the communist parties and when the Sovietisation was carried out, the system of people's democracy became no longer necessary and the theoretical stand prevailed that there is only one, Soviet "road" to socialism. By 1948 Yugoslavia was already styled after the Soviet model. The dispute with the Inform-Bureau (Information Bureau of the Communist Parties] made it impossible that this change be also technically confirmed. Though Yugoslavia, after the dispute, adopted a different model (self-management) than the one in Eastern Europe, by the beginning of the fifties there was no more any need for duality in Yugoslavia either. The Constitutional Law from 1953 considered Yugoslavia to be a socialist state, though the term Socialist Federal Republic of Yugoslavia was adopted ten years later, in the Constitution from 1963.