History 66 Politics and government 55 Social conditions 34 Economic conditions 32 Diplomatic relations 18 Foreign relations 18 Capitalism 17 Socialism 15 Economic policy 10 Women 10 Communism 9 Political aspects 9 Social classes 9 Political activity 8 Imperialism 7 International economic relations 7 Race relations 7 Economic development 6 Economic history 6 Feminism 6 African Americans 5 Civil rights 5 Foreign economic relations 5 Guerrillas 5 Description and travel 4 Labor movement 4 Marxian economics 4 Middle class 4 Nationalism 4 Political science 4