Social aspects History 15 Social conditions 7 Economic conditions 4 Anthracite coal mines and mining 2 Cultural assimilation 2 Emigration and immigration 2 more ... Environmental aspects 2 Ethnic identity 2 Ethnic relations 2 Free African Americans 2 Intellectual life 2 Memory 2 Mexican Americans 2 Race relations 2 Social life and customs 2 Steel industry and trade 2 African American consumers 1 African American families 1 African American girls 1 African American soldiers 1 African Americans 1 American poetry 1 Architecture, Domestic 1 Art, American 1 Artisans 1 Borderlands 1 City planning 1 Coal mines and mining in literature 1 Community and college 1 less ...