History 86 Social conditions 30 Labor movement 16 Economic conditions 14 Labor unions 12 Urban renewal 9 Coal miners 8 more ... Industries 8 Race relations 8 Social aspects 8 Women 8 Womyn 8 Working class 8 Politics and government 7 Iron and steel workers 6 City planning 5 Employment 5 Gentrification 5 Prisoners 5 Crime 4 Poor 4 Prisons 4 Railroads 4 Steel industry and trade 4 Strikes and lockouts 4 Violence 4 Accidents 3 African Americans 3 Commerce 3 Criminals 3 less ...