History 1,336 Politics and government 290 History and criticism 270 Social conditions 174 Social aspects 170 Philosophy 166 Criticism and interpretation 141 Foreign relations 130 African Americans 114 Political aspects 98 Intellectual life 95 Race relations 89 Civilization 87 Economic conditions 77 Economic aspects 70 Influence 65 Education 61 Religious aspects 60 Social life and customs 60 American literature 56 Law 55 Science 52 Slavery 52 Law and legislation 51 Research 51 Moral and ethical aspects 50 Psychological aspects 49 Relations 48 Psychology 47 World War, 1939-1945 44