Foreign relations -- National characteristics, American Ancient influences 1 Christianity and other religions -- 1 Civilization, Modern -- 1 Democracy -- 1 History -- 1 more ... Imperialism 1 Influence 1 Islam 1 Military policy 1 Moral and ethical aspects 1 Political messianism -- 1 Psychological aspects. -- 1 Radicalism -- 1 September 11 Terrorist Attacks, 2001 -- 1 War on Terrorism, 2001-2009 1 World politics -- 1 less ...