Politics and government -- 41 Economic integration 26 Foreign relations -- 19 Congresses 11 History -- 10 Congresses -- 9 Economic policy 9 more ... Economic conditions -- 7 Economic integration -- 7 Foreign economic relations -- 7 Politics and government 6 World politics -- 5 Defenses 4 Economic conditions 4 History 4 Military policy 4 Relations -- 4 Cold War 3 Commerce -- 3 Emigration and immigration -- 3 European Economic Community countries -- 3 Foreign relations 3 Monetary policy -- 3 National security -- 3 Social conditions -- 3 Arms control -- 2 Citizenship -- 2 Civilization -- 2 Commerce 2 Defenses -- 2 less ...