Politics and government 909 World politics 277 World War, 1939-1945 194 World War, 1914-1918 112 Economic conditions 106 Military policy 101 Diplomatic history 99 International relations 78 Catholic Church 77 Causes 72 Economic policy 70 Foreign economic relations 62 Cold War 61 Social conditions 60 Relations (diplomatic) 56 Communism 55 Peace 55 Public opinion 55 Eastern question (Far East) 54 National security 52 Relations 51 Holocaust, Jewish (1939-1945) 49 Vietnam War, 1961-1975 48 Statesmen 44 Civilization 38 Diplomats 38 Neutrality 37 Arab-Israeli conflict 33 Presidents 32 Colonies 31 Imperialism 30 Foreign relations administration 29 Nationalism 29 Territorial expansion 29 Defenses 27 Philosophy 26 International cooperation 24 Intervention (International law) 24 Civil rights 23 Democracy 23 Human rights 23 Ambassadors 22 Economic assistance, American 21 International law 21 Walsh Collection 21 Commerce 20 Security, International 20 Armed Forces 19 Influence 19 Jewish-Arab relations 18 Jews 18 Monroe doctrine 18 Zionism 18 Church history 17 Ethnic relations 17 Reconstruction (1939-1951) 17 Detente 16 History, Military 16 Social aspects 15 Social policy 15 Strategic aspects 15 Church and state 14 Commercial policy 14 Diplomacy 14 Foreign public opinion 14 Historiography 14 History 14 Military relations 14 Description and travel 13 Disarmament 13 Law and legislation 13 Military assistance, American 13 Nuclear arms control 13 Political aspects 13 European federation 12 Nuclear weapons 12 Race relations 12 Japanese 11 Moral and ethical aspects 11 Eastern question (Balkan) 10 Executive power 10 Geopolitics 10 International organization 10 Pan-Americanism 10 Prime ministers 10 Revolutions 10 Terrorism 10 War 10 Boundaries 9 Cabinet officers 9 Decision-making 9 Diplomatic and consular service, American 9 Eastern question 9 German reunification question (1949-1990) 9 Government policy 9 Nuclear disarmament 9 Nuclear nonproliferation 9 Participation, French 9 Territorial questions 9 African Americans 8