Communism 227 African Americans 22 Politics and government 21 Civil rights 15 Subversive activities 14 History 12 World War, 1939-1945 11 more ... Communist 8 Labor unions 8 Race relations 8 Social conditions 8 Labor and laboring classes 7 Personal narratives 7 Communists 6 Internal security 6 Socialism 6 Foreign relations 5 Anti-communist movements 4 Biography 4 Campaign literature, 1948 4 Communist trials 4 Congresses 3 Economic conditions 3 Emigration and immigration 3 Intellectual life 3 Labor unions and communism 3 Legislators 3 Motion pictures 3 Political activity 3 Propaganda, Communist 3 Youth 3 Civilization 2 Coal miners 2 Economic history 2 Espionage 2 Fascism 2 Germans 2 Intellectuals 2 Jews 2 Museums 2 less ...