Parag Khanna, Senior Research Fellow, New America Foundation

Many observers say 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, the United States will have to reengage the world. Author Parag Khanna argues that after such reengagement, the U.S. will face 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.