ROBERT KAPLAN: America’s Darwinian Nationalism.
Ironically, the human-rights community understands a basic truth about the American historical and spiritual condition that too few others do—which is that while other states have survived and even prospered by a ruthless realpolitik of sorts, America, because it was born as a geographic bounty and also as an ideal, is nothing without both. Other nations may only represent themselves. But America must, to a certain reasonable extent, represent humanity—or at least aspire to. There have been periods where America has not done so, and there have been periods where it has tried too hard to do so. But what counts is the preservation of the tension between those two extremes. If the United States ever truly decided that its own good was no longer bound up anymore with the good of the world, then America’s reputation for power would begin to disintegrate in a way that it would not for another country. This is why the liberal world order that the United States has built in Europe and Asia since the Second World War signifies the culmination of the American experience. Though extending that world order much further might be beyond the capacity of the United States, simply retreating from it must lead to American decline. For while the interests of state, properly defined, lead to peace by respecting the interests of other states, alliances are much harder to maintain without declared values, and thus our values themselves are part of our strategic advantage.
That’s not a bad one-paragraph definition of American Exceptionalism — and there are other worthwhile bits in the rest of Kaplan’s (lengthy) piece.