Politics and government -- 28 Foreign relations -- 22 Economic conditions -- 15 Economic policy -- 14 History -- 10 Terrorism -- 9 Commercial policy 8 more ... Economic conditions 8 Foreign relations 8 Prevention 8 Security, International 8 World politics -- 7 History 6 International cooperation 6 International economic integration 6 Politics and government 6 Conflict management -- 5 Congresses -- 5 Economic policy 5 Foreign economic relations 5 International economic relations 5 Nationalism -- 5 Terrorism 5 Appropriations and expenditures 4 Armed Forces -- 4 Civil war 4 Commerce 4 Congresses 4 Democracy -- 4 Military policy 4 less ...