Social conditions Politics and government 45 History 44 Economic conditions 22 Communism 17 Social aspects 14 Foreign relations 9 World War, 1939-1945 8 Social life and customs 7 Political aspects 6 Relations 5 City and town life 4 Civilization 4 Description and travel 4 Economic policy 4 Ethnic relations 4 Intellectual life 4 Political culture 4 Political persecution 4 Political prisoners 4 Social change 4 World War, 1914-1918 4 Cold War 3 Influence 3 Political purges 3 Reconstruction (1939-1951) 3 Soldiers 3 Youth 3 Children 2 Education 2