Foreign relations -- Imperialism Military policy 2 Balance of power 1 Capitalism -- 1 Christianity and other religions -- 1 Conservatism -- 1 more ... Influence 1 Islam 1 National characteristics, American 1 Philosophy 1 Political aspects 1 Political messianism -- 1 Psychological aspects. -- 1 Radicalism -- 1 September 11 Terrorist Attacks, 2001 -- 1 War on Terrorism, 2001-2009 1 War on terrorism, 2001- 1 less ...