Working class History 566 Social conditions 249 Labor movement 138 Economic conditions 132 Labor 115 Political activity 115 יותר ... Politics and government 100 Labor unions 92 Social aspects 88 Social life and customs 52 Social classes 51 Education 42 Industrial relations 37 Race relations 35 Poor 32 Immigrants 31 History and criticism 28 Employment 26 Slavery 25 Women 25 Political aspects 24 Socialism 22 Economic policy 20 African Americans 19 Communism 19 Education (Higher) 19 Capitalism 18 Radicalism 18 Employees 17 פחות ...