History 113 Politics and government 35 History and criticism 28 Civilization 22 Description and travel 22 Travel 22 Manners and customs 18 Social life and customs 18 American literature 13 Authors, American 13 Diplomatic relations 13 Foreign relations 13 World War, 1939-1945 13 Philosophy 11 African Americans 10 Communism 10 Social conditions 10 Art 9 Intellectual life 9 Criticism and interpretation 8 English literature 7 Indigenous peoples 7 Photography, Artistic 7 Presidents 7 Race relations 7 Authors 6 Indians of North America 6 Psychology 6 Technique 6 Theater 6