History 40 Politics and government 36 Foreign relations 27 Communism 19 Arms race 6 Military policy 6 Democracy 5 Economic conditions 5 Terrorism 5 Biography 4 Congresses 4 Nationalism 4 Revolutions 4 World War, 1939-1945 4 Armed Forces 3 China 3 Communist parties 3 Economic policy 3 Intelligence service 3 Nuclear arms control 3 Nuclear weapons 3 Political activity 3 Prevention 3 Public opinion 3 Relations 3 United States 3 Balance of power 2 Campaigns 2 Civilization 2 Communist countries 2