Foreign relations Politics and government 522 History 414 World politics 135 Sources 99 World War, 1939-1945 79 Foreign economic relations 67 Economic conditions 63 World War, 1914-1918 57 Military policy 53 Communism 44 Congresses 41 Diplomatic history 40 Biography 37 Economic policy 37 Treaties 37 International relations 36 Colonies 34 Eastern question (Far East) 33 Causes 32 Social conditions 29 Commerce 26 Defenses 26 Public opinion 26 Relations 25 Neutrality 24 Peace 24 Periodicals 24 Diplomats 16 Nationalism 16