History 842 Cities and towns 585 City planning 433 Slavery 304 Urbanization 268 Social conditions 265 Sociology, Urban 188 more ... Race relations 170 Urban renewal 160 Urban policy 155 Slave trade 145 Growth 113 Racism 111 Economic conditions 106 Enslaved persons 104 Middle class 96 Social aspects 92 City and town life 91 Regional planning 90 Social classes 90 Urban economics 90 Metropolitan areas 60 Politics and government 59 Suburbs 57 Urban ecology (Sociology) 56 Economic aspects 52 Black people 51 Race 51 Emancipation 50 Nobility 48 less ...