History 375 Social conditions 152 African Americans 140 Race relations 85 Politics and government 66 Architecture 61 Social aspects 54 more ... Buildings, structures, etc 53 History and criticism 49 Intellectual life 34 Art 31 City planning 29 Social life and customs 28 Economic conditions 25 Emigration and immigration 23 Civil rights 21 Immigrants 21 American literature 20 Political activity 20 Urban renewal 20 Working class 20 Political aspects 19 Education 18 Gangs 17 Labor movement 17 Police 17 Jews 16 Women 16 Art collections 15 Art museums 15 less ...