Working class History 40 Social conditions 15 Political activity 12 Clase trabajadora 10 Historia 10 Labor movement 10 plus ... Politics and government 10 Clase obrera 9 Economic conditions 8 Labor 8 Labor unions 6 Syndicalism 6 Dwellings 4 Education 4 Industrial relations 4 Labor laws and legislation 4 Trabajo 4 Actividad política 3 Communism 3 Condiciones sociales 3 Low-income housing 3 Movimiento obrero 3 Social aspects 3 Social life and customs 3 Social problems 3 Socialism 3 Anarchism 2 Ciencias sociales 2 Clase de trabajo 2 moins ...