Foreign relations -- 46 Politics and government -- 33 Terrorism -- 31 Economic conditions 22 English language -- 21 History -- 20 Economic conditions -- 17 more ... Politics and government 15 Economic policy 14 Congresses 12 Terrorism 12 World politics -- 12 Congresses -- 11 Foreign relations 11 Government policy -- 11 Military policy 11 Prevention 10 Economic policy -- 9 National security -- 9 Prevention -- 9 Relations -- 9 Study and teaching 8 Autonomy and independence movements 7 Foreign economic relations 7 Presidents -- 7 Defenses 6 History 6 Political aspects 6 Technical assistance -- 6 Fiction 5 less ...