History 52 Social conditions Social change 10 Economic conditions 8 Politics and government 8 Race relations 8 Economic history 7 more ... Ethnic relations 7 Community life 6 Social aspects 6 Cities and towns 4 Political aspects 4 African Americans 3 City planning 3 Coal mines and mining 3 Emigration and immigration 3 Enslaved persons 3 Group identity 3 Immigrants 3 Murder 3 Muslims 3 Psychological aspects 3 Religious aspects 3 Slavery 3 Social classes 3 Social reformers 3 Architecture 2 City and town life 2 Collective memory 2 Community development 2 less ...