History 44 Working class 44 Labor unions 14 Trade-unions 5 Labor 3 Social conditions 3 Anarchism 2 Industrial relations 2 American poetry 1 British 1 Bureaucracy 1 Christianity 1 Cities and towns 1 Economic aspects 1 Economic conditions 1 Economics 1 Factory system 1 Haymarket Square Riot, Chicago, Ill., 1886 1 History and criticism 1 Industrial management 1 Labor policy 1 Labor supply 1 Law and legislation 1 Machinery in the workplace 1 Middle class 1 New Deal, 1933-1939 1 Pictorial works 1 Political parties 1 Protest poetry, American 1 Public schools 1