Political aspects Foreign relations -- 4 History -- 2 Petroleum industry and trade -- 2 Political aspects -- 2 Biography -- 1 Diplomacy -- 1 more ... Diplomats -- 1 Drug control -- 1 Drug traffic -- 1 Energy policy -- 1 Environmental aspects 1 Foreign economic relations 1 Foreign public opinion 1 Great powers 1 History 1 Intelligence service -- 1 International economic relations -- 1 Islamic fundamentalism -- 1 Languages -- 1 Nationalism -- 1 Petroleum reserves -- 1 Philosophy 1 Pluralism (social sciences) -- 1 Realism -- 1 Terrorism -- 1 War on Terrorism, 2001 -- 1 less ...