The world is in turmoil. Whether one looks at Europe, Asia, North America, the Middle East, Africa, or Latin America, uncertainty and upheaval seem to be the order of the day. Nevertheless, there seems to be an odd certainty in the minds of many pundits, writers, and citizens in this highly volatile world of geopolitics: the days of the United States as the world's sole superpower are over. The consensus tells us that the United States will not be...