Politics and government 5,917 History 1,633 Slavery 400 Political activity 349 Foreign relations 242 African Americans 220 Presidents 208 more ... Political science 171 Social conditions 163 Sources 157 Political parties 151 Biography 141 Causes 141 Periodicals 129 Political aspects 122 Jews 121 Colonies 117 Political refugees 117 Economic conditions 101 World politics 98 Secession 87 Race relations 86 Extension to the territories 85 Reconstruction 83 Statesmen 83 Election 77 Societies, etc 75 Communism 74 Speeches in Congress 74 Political history 70 Legislators 66 World War, 1939-1945 66 Elections 65 Law 65 Republican 65 Civil rights 64 Democratic 63 Social life and customs 61 World War, 1914-1918 60 Political and social views 57 less ...