Working class History 956 Social conditions 413 Labor unions 229 Economic conditions 223 Labor movement 206 Labor 192 mer ... Political activity 192 Politics and government 184 Social aspects 115 Social classes 97 Industrial relations 74 Social life and customs 72 Poor 64 Education 62 Socialism 58 Employment 57 Race relations 57 History and criticism 55 Industries 51 Women 50 African Americans 42 Immigrants 42 Economic aspects 39 Economic policy 39 Labor policy 37 Communism 34 Strikes and lockouts 34 Wages 34 Slavery 33 mindre ...