Working class History 991 Social conditions 429 Labor unions 237 Economic conditions 228 Labor movement 215 Labor 203 更多 ... Political activity 198 Politics and government 185 Social aspects 115 Social classes 97 Industrial relations 79 Social life and customs 74 Education 66 Poor 65 Socialism 62 Race relations 59 Employment 57 History and criticism 55 Industries 52 Women 50 African Americans 42 Economic aspects 42 Immigrants 42 Economic policy 39 Labor policy 37 Slavery 37 Communism 36 Strikes and lockouts 34 Wages 34 少 ...