Politics and government -- 114 Foreign relations -- 105 Economic integration 77 History -- 51 Foreign economic relations -- 37 Relations -- 37 Defenses 29 more ... History 27 National security -- 27 Politics and government 25 World politics -- 25 Congresses 24 Economic conditions -- 23 Military policy 22 Congresses -- 19 Security, International 19 Foreign relations 18 Economic conditions 17 Economic integration -- 15 Economic policy 15 Islam -- 14 Periodicals 12 Arms control -- 9 Commerce -- 9 International relations 9 European cooperation 8 International agencies -- 8 Defenses -- 7 Economic policy -- 7 Emigration and immigration -- 7 less ...