History 1,855 Colonies 861 Politics and government 657 Foreign relations 620 History and criticism 272 Causes 251 Commerce 171 more ... World War, 1939-1945 134 Administration 121 Relations 117 Slavery 102 English literature 99 Social aspects 95 American literature 90 Foreign public opinion 87 Antislavery movements 82 Law and legislation 73 Political aspects 71 Taxation 66 English fiction 65 Modernism (Literature) 65 Diplomatic history 64 Public opinion 62 American fiction 61 Economic conditions 58 Emigration and immigration 58 Indians of North America 58 Economic policy 57 Civilization 54 Social conditions 54 less ...