History 254,722 Politics and government 66,131 History and criticism 57,713 Social aspects 33,792 Social conditions 30,668 Philosophy 28,155 Criticism and interpretation 25,431 mere ... Jazz 23,831 Foreign relations 19,673 Economic conditions 19,548 Women 19,344 Social life and customs 18,840 Piano music 17,950 Education 17,883 Study and teaching 17,148 Religious aspects 16,533 Law and legislation 15,990 Research 15,694 Operas 15,374 Political aspects 15,226 African Americans 13,933 Symphonies 13,544 Music 13,285 Christianity 13,110 Motion pictures 12,950 Civilization 12,744 Description and travel 12,049 Management 12,026 Religion 11,992 Economic aspects 11,745 mindre ...