America's current global predominance constitutes, for the first time, a unipolar system with far-reaching political, economic, and security implications. Can the U.S. maintain its supremacy for the foreseeable future? Consider sources of U.S. strength, examine how varied and durable they are, and discuss how resources can be channeled to conduct a more coherent and visionary foreign policy. Attempt to answer an even larger question: How should America deal with other significant powers, such as Russia, China, India, and Japan - not only to thwart any attempt to check or diminish its primacy, but to lead with moral authority?