Parag Khanna, Senior Research Fellow, New America Foundation

Many observers feel that a preoccupation with the war on terror has resulted in a more unilateral approach to American foreign policy. These experts predict that to regain the full expression of its global power that United States will have to re engage the world. Author Parag Khanna argues that such re engagement will confront the U.S. with a vastly different world order. In the world of the 21st century there are three empires in Khanna's view: America, the European Union and China. In this conversation he explains how they both compete and cooperate.