History Labor movement Labor unions 30 Working class 16 Labor 9 Political activity 8 Industrial relations 6 Mais ... Employment 4 Labor laws and legislation 4 Politics and government 4 Strikes and lockouts 4 Foreign relations 3 International relations 3 African American labor union members 2 African Americans 2 Civil rights 2 Coal miners 2 Coal mines and mining 2 Employees 2 Foreign workers 2 Labor leaders 2 Social conditions 2 Autonomy and independence movements 1 Child labor 1 Christianity 1 Class consciousness 1 Coal mining 1 Cooperation 1 Corrupt practices 1 Discrimination in employment 1 menos ...