World politics -- International relations 6 National security -- 5 Security, International 5 Globalization 4 Terrorism 4 Defenses 3 more ... 21st century 2 Balance of power 2 Foreign relations -- 2 History -- 2 International cooperation 2 International relations -- 2 Military policy 2 National security 2 Political aspects 2 Political violence 2 Regionalism (International organization) 2 September 11 Terrorist Attacks, 2001 2 Southeast Asia -- 2 Strategic aspects 2 War 2 War on Terrorism, 2001-2009 2 War on terrorism, 2001- 2 Diplomacy 1 Economic aspects 1 Ethnic conflict -- 1 Foreign relations 1 Globalization -- 1 Great powers 1 less ...