History 78,900 History and criticism 24,643 Politics and government 17,722 Social aspects 14,093 Criticism and interpretation 12,186 Social conditions 11,747 Philosophy 11,009 Study and teaching 10,369 Jazz 9,817 Education 8,282 Research 7,737 Social life and customs 7,162 Economic conditions 7,151 Women 6,345 Foreign relations 6,261 Management 6,213 Political aspects 6,000 Law and legislation 5,595 African Americans 5,400 English language 5,075 Psychological aspects 4,971 Popular music 4,789 Religious aspects 4,702 Economic aspects 4,605 Civilization 4,563 Music 4,469 Science 4,466 American literature 4,378 English literature 4,105 Psychology 4,084