"In the end, however, what other nations do or do not say about the United States will not be crucial to whether, or for how long, the United States continues to function as the world’s government. That will depend on the willingness of the American public, the ultimate arbiter of American foreign policy, to sustain the costs involved. In the near future, America’s role in the world will have to compete for public funds with the rising costs of domestic entitlement programs. It is Social Security and Medicare, not the rise of China or the kind of coalition that defeated powerful empires in the past, that pose the greatest threat to America’s role as the world’s government.
The outcome of the looming contest in the United States between the national commitment to social welfare at home and the requirements for stability and prosperity abroad cannot be foreseen with any precision. About other countries’ approach to America’s remarkable 21st-century global role, however, three things may be safely predicted: They will not pay for it, they will continue to criticize it, and they will miss it when it is gone."