Materia
History
58,102
Politics and government
18,071
Foreign relations
9,239
African Americans
8,801
Social conditions
8,186
Social aspects
7,657
Race relations
7,298
History and criticism
7,285
Slavery
5,186
Civil rights
5,145
Political aspects
5,025
Law and legislation
5,000
Presidents
4,367
Government policy
4,134
Economic conditions
4,085
Education
3,872
Church and state
3,831
Racism
3,691
Women
3,365
Civil rights movements
3,188
Economic aspects
3,147
Social life and customs
3,122
American literature
2,608
Civilization
2,449
World War, 1939-1945
2,383
Research
2,362
Intellectual life
2,180
Emigration and immigration
2,144
Study and teaching
2,027
Indians of North America
2,020
Religious aspects
2,020
Prevention
1,937
Relations
1,930
Political activity
1,864
Economic policy
1,850
Public opinion
1,796
Criticism and interpretation
1,793
Influence
1,786
Religion
1,782
Philosophy
1,728
Legal status, laws, etc
1,720
Jews
1,659
Campaigns
1,649
Medical care
1,580
Finance
1,565
Immigrants
1,468
Description and travel
1,455
Universities and colleges
1,444
Church history
1,434
Education and state
1,414
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