History 407 Social conditions 156 African Americans 137 Race relations 99 Politics and government 76 Architecture 61 Social aspects 57 more ... Buildings, structures, etc 54 History and criticism 47 Art 32 Intellectual life 32 Social life and customs 31 City planning 30 Civil rights 26 Economic conditions 25 Political aspects 24 Emigration and immigration 23 Education 22 Immigrants 22 Political activity 21 Working class 20 Ethnic relations 19 Jews 19 American literature 18 Police 18 Urban renewal 18 Ethnic identity 17 Gangs 17 Labor movement 17 Buildings 16 less ...