International cooperation Security, International 19 Environmental policy -- 18 International relations 16 Terrorism -- 13 Prevention -- 12 Economic development -- 11 more ... Environmental aspects 11 International economic relations 11 Environmental protection -- 9 National security -- 8 Political aspects 8 Economic policy 7 Law and legislation 7 International relations -- 6 Climatic changes -- 5 Democracy 5 Democratization -- 5 Economic conditions 5 Economic policy -- 5 Foreign relations -- 5 Globalization 5 International organization 5 Refugees -- 5 World politics -- 5 Commercial policy 4 Communication -- 4 Economic development 4 Environmental policy 4 Foreign economic relations 4 less ...