"The mounting expenses of servicing the growing national debt, combined with the skyrocketing costs of Social Security and Medicare as the 78-million-strong baby-boom generation retires, will leave less money for American initiatives abroad. ... This will change the world, and not for the better. American foreign policy, for all its shortcomings, has underpinned political stability around the world. How, then, should the US adapt what it does abroad to minimize the damage to global security caused by its straitened circumstances?"