Political Culture Theory

Political Culture TheoryAfter watching the video below, please write about the question.Islam: What the West Needs to Know
http://www.youtube.com/watch?v=olkjSL6fTHU&list=PL4773248F2A6B6DC9Question: Why does Barber believe that the realist paradigm fails to provide U.S. guidance for U.S. foreign policy in the 21st century?