History 568 African Americans 132 Politics and government 125 Social conditions 88 Economic conditions 70 American literature 60 Social life and customs 58 Indians of North America 53 Slavery 47 Civil rights 43 History and criticism 42 Depressions 36 Race relations 36 Foreign relations 34 World War, 1939-1945 34 Women 33 Study and teaching 31 Women's rights 31 Women artists 28 Women in art 28 Feminist art criticism 27 Racism 26 Social structure 26 Industrialization 25 Civil rights movements 23 Criticism and interpretation 23 Economics 23 Ethnicity 23 Colonies 22 Music 22