“There is no stable balance of power in Europe or Asia without the United States. And while we can talk about “soft power” and “smart power,” they have been and always will be of limited value when confronting raw military power. Despite all of the loose talk of American decline, it is in the military realm where U.S. advantages remain clearest. Even in other great powers’ backyards, the United States retains the capacity, along with its powerful allies, to deter challenges to the security order. But without a U.S. willingness to maintain the balance in far-flung regions of the world, the system will buckle under the unrestrained military competition of regional powers.”