History 27,280 History and criticism 8,414 Social aspects 6,355 Politics and government 6,011 Philosophy 4,450 Social conditions 4,346 Criticism and interpretation 3,707 Political aspects 2,889 Research 2,844 Study and teaching 2,500 Economic conditions 2,469 Religious aspects 2,200 Foreign relations 2,107 Management 2,029 Social life and customs 1,985 Government policy 1,963 Psychological aspects 1,955 Law and legislation 1,941 Women 1,933 Economic aspects 1,931 Education 1,895 English language 1,563 Intellectual life 1,404 Civilization 1,354 Methodology 1,354 Criticism, interpretation, etc 1,330 Prevention 1,327 Christianity 1,317 Environmental aspects 1,310 Moral and ethical aspects 1,295