Influence 3 September 11 Terrorist Attacks, 2001 -- Foreign relations -- 2 Christianity and other religions -- 1 Cold War -- 1 Diplomatic history 1 Government policy -- 1 more ... Imperialism 1 Islam 1 Military policy 1 National characteristics, American 1 Negotiation -- 1 Political aspects 1 Political culture -- 1 Political messianism -- 1 Politics and government -- 1 Psychological aspects. -- 1 Radicalism -- 1 Terrorism -- 1 Voting -- 1 War on Terrorism, 2001 -- 1 War on Terrorism, 2001- -- 1 War on Terrorism, 2001-2009 1 less ...