Civilization 16 History 16 Social conditions 16 Economic conditions 11 Politics and government 11 Foreign relations 7 World politics 5 more ... African Americans 4 Civil rights 4 Minorities 4 Political activity 4 Cold War 3 Economic history 3 Education 3 Jews 3 Polish people 3 Popular culture 3 Race relations 3 Slovaks 3 Social aspects 3 Societies, etc 3 World War, 1939-1945 3 15.85 history of America 2 Biography 2 Commerce 2 Conditions économiques 2 Congresses 2 Cultural pluralism 2 Culture populaire 2 Depressions 2 Descriptions et voyages 2 Economic aspects 2 Ethnic relations 2 Histoire 2 Industries 2 Intellectual life 2 Judaism 2 Politique et gouvernement 2 Public opinion 2 Reconstruction (1939-1951) 2 less ...