Based on all criteria - military power, economic influence, cultural dominance - America remains number one, even though other, new players are increasingly challenging it in that role.
Robert KaganWhen it comes to setting national priorities, determining threats, defining challenges, and fashioning and implementing foreign and defense policies, the United States and Europe have parted ways.
Robert KaganIf a caterpillar doesn't know its future has wings, it hardly experiences itself as land-bound.
Robert KaganThe thing that I would say is that U.S. power is not eternal. I am not saying that it won't come to an end. Because it will.
Robert Kagan