Political aspects Ethnic relations -- 10 Globalization -- 10 Foreign relations -- 9 World politics -- 8 Economic aspects 7 International relations 7 more ... Petroleum industry and trade -- 5 Social aspects 5 Terrorism -- 5 International economic relations 4 Environmental aspects 3 Ethnic relations 3 Ethnicity 3 International economic relations -- 3 International relations -- 3 Political aspects -- 3 Politics and government 3 Comparative government 2 Computer network resources 2 Conflict management -- 2 Democracy 2 Democracy -- 2 Economic assistance -- 2 Energy policy 2 Energy policy -- 2 Environmental policy 2 Ethnicity -- 2 Foreign public opinion 2 Globalization 2 less ...