History 259 History and criticism 100 Politics and government 63 Social conditions 40 English literature 33 Chemistry 30 Criticism and interpretation 30 Social aspects 23 Foreign relations 22 Intellectual life 19 Church history 16 Economic conditions 16 Mathematics 16 Historiography 14 Physics 14 Colonies 13 English fiction 12 English poetry 12 Women 12 World War, 1939-1945 12 Biotechnology 11 In literature 11 Influence 11 Mathematical models 11 Nationalism 11 Political aspects 11 Quantum theory 11 Women authors 11 World War, 1914-1918 11 Literature and society 8