History 24 Communism 12 Politics and government 9 Revolutionaries 6 Social conditions 6 Economics 5 Heads of state 5 Communists 3 Folklore 3 History and criticism 3 Socialism 3 Statesmen 3 World War, 1939-1945 3 Assassination 2 Biography 2 Conservation of natural resources 2 Critics 2 Development economics 2 Dialectical materialism 2 Dialogism (Literary analysis) 2 Electrification 2 Fiction 2 Foreign relations 2 HISTORY / Revolutionary 2 Industrial policy 2 Intellectual life 2 Literature 2 Methodology 2 Minorities 2 Motion picture producers and directors 2