With James M. Goldgeier | As the world moves away from the familiar bipolar cold war era, many international relations theorists have renewed and old debate about which is more stable: a world with two great power or a world with many great powers. Based on the chief assumptions of structural realism (...), some security analysts are predicting that a world of several great powers will return to the shifting alliances and instabilities of the multipolar era that existed prior to World War II.