History 56,463 History and criticism 16,302 African Americans 14,227 Histoire 12,953 Politics and government 12,744 Social conditions 8,990 American literature 7,456 more ... Foreign relations 6,918 American poetry 6,521 Race relations 6,238 World War, 1939-1945 5,741 Social aspects 5,498 Criticism and interpretation 5,429 Social life and customs 5,219 Authors, American 4,386 American fiction 4,383 Indians of North America 4,093 Economic conditions 3,996 Histoire et critique 3,900 Civilization 3,842 Women 3,663 Intellectual life 3,551 Civil rights 3,315 Politique et gouvernement 3,256 Noirs américains 3,122 Education 3,046 Political aspects 2,944 Art, American 2,909 Congresses 2,763 Philosophy 2,431 less ...