Labor and laboring classes Labor unions 80 History 66 Economic conditions 26 Social conditions 25 Employment 22 Fiction 21 more ... Radicalism 19 Strikes and lockouts 17 Socialism 15 Biography 12 Communism 12 Dwellings 12 Politics and government 10 Addresses, essays, lectures 9 Emigration and immigration 9 Labor laws and legislation 9 Periodicals 9 African Americans 8 Housing 8 Industries 8 Poor 8 Songs and music 8 Women 8 Jews 7 Wages 7 Capitalism 6 Cost and standard of living 5 Labor 5 Poetry 5 Chinese 4 Ethnic groups 4 Industrial relations 4 Officials and employees 4 Political activity 4 Race relations 4 Tenement houses 4 Working class 4 Agricultural laborers 3 Christianity 3 less ...