History 254,710 Politics and government 66,128 History and criticism 57,712 Social aspects 33,790 Social conditions 30,666 Philosophy 28,155 Criticism and interpretation 25,428 more ... Jazz 23,831 Foreign relations 19,671 Economic conditions 19,547 Women 19,342 Social life and customs 18,838 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 15,223 African Americans 13,933 Symphonies 13,544 Music 13,285 Christianity 13,110 Motion pictures 12,950 Civilization 12,743 Description and travel 12,049 Management 12,025 Religion 11,992 Economic aspects 11,745 less ...