Foreign relations -- 2 Military policy National characteristics, American 2 Christianity and other religions -- 1 Foreign relations 1 Historiography 1 History. -- 1 more ... Imperialism 1 Influence 1 Islam 1 Militarism -- 1 Nationalism -- 1 Philosophy 1 Political messianism -- 1 Psychological aspects. -- 1 Radicalism -- 1 September 11 Terrorist Attacks, 2001 -- 1 War on Terrorism, 2001-2009 1 less ...