Radicalism -- 2 Attitudes -- 1 Christianity and other religions -- 1 Civilization -- 1 Foreign public opinion, American 1 Foreign relations -- 1 History -- 1 more ... Imperialism 1 Influence 1 Intellectuals -- 1 Islam 1 Military policy 1 National characteristics, American 1 Political culture -- 1 Political messianism -- 1 Progressivism (United States politics) 1 Psychological aspects. -- 1 Public opinion -- 1 Radicals -- 1 Relations -- 1 September 11 Terrorist Attacks, 2001 -- 1 War on Terrorism, 2001-2009 1 less ...