History African Americans 74 Social conditions 68 Race relations 52 Politics and government 40 Architecture 31 Buildings, structures, etc 31 more ... Social aspects 21 Civil rights 19 Economic conditions 17 City planning 16 Intellectual life 16 History and criticism 15 Migrations 14 Labor movement 13 Civil rights movements 12 Education 12 Political activity 12 Political aspects 12 Working class 12 Social life and customs 11 Buildings 10 Haymarket Square Riot, Chicago, Ill., 1886 10 Social reformers 10 Architecture and society 9 City and town life 9 Ethnic relations 9 Labor unions 9 Skyscrapers 9 Emigration and immigration 8 less ...