This month marks the second anniversary of September 15, 2008, a date that will be remembered as one of the worst moments in the history of the global economy. On that day US investment bank Lehman Brothers collapsed, triggering a major financial crisis and dramatically worsening a worldwide recession whose effects are still being felt.
The date also matters in the history of international politics, accelerating what is destined to be the most important international political trend of the second decade of the 21st century: the growing financial obligations of the United States government. Coping with these obligations will limit the resources available for American foreign policy, thereby reducing the nation's international role. Because that role is so important - the United States acts as the world's de facto government, providing to other countries many of the services that governments typically furnish to the societies they govern - this will have a major, and in all likelihood dangerous, impact both on the global economy and on international politics. That impact is the subject of my new book, The Frugal Superpower: America's Global Leadership in a Cash-Strapped World.
In the years leading up to the Lehman collapse, the United States substantially increased its national debt. To cope with the financial crisis that the collapse brought about, and the deep recession that it aggravated, the US government borrowed more money, further expanding this debt. Most ominously for the country's fiscal future and for its foreign policy, the bill the American government expects to pay for its principal entitlement programs for the elderly - Social Security and Medicare - will soar in the decades ahead with the retirement of the 75 million members of the so-called baby boom generation, who were born between 1946 and 1964.
Because the government will not be able to borrow all the money necessary to meet these obligations, and because the cost of paying the interest on trillions of dollars already borrowed will rise sharply, the US will have little choice but to raise taxes and reduce benefits for all citizens. In these circumstances, the domestic support for foreign policies of all kinds will fall sharply. Americans will feel considerably less generous than in the past about providing the funds for their country's foreign policy, and the government will have less to spend on it. Consequently, the United States will do less in the world in the future than it has in the past. This will transform international relations.
The events of September 2008 and thereafter have already eliminated an important international economic role of the United States. With Americans spending less and saving more, their country has ceased to be the world's consumer of last resort, on which other countries can rely to buy the products they make for export. Another major international economic role is still intact, but because of mounting national debt, looks increasingly shaky: The dollar remains the world's principal currency, but as much because of the lack of a viable substitute as because of affirmative global confidence in American economic dependability. That confidence is beginning to waver. The long-term continuation of the special status of the American currency in world markets is not assured.
As for international politics and international security, some tasks that the United States has carried out will almost certainly be eliminated. The use of American military forces to protect people persecuted by their own governments, which the United States undertook in Somalia, Haiti, Bosnia and Kosovo, will not be repeated. Nor will the strenuous military effort to foster political stability and democracy in which the American government is engaged in Afghanistan and Iraq be launched elsewhere or even continued in those countries for much longer.
The deterioration of the US fiscal condition will also affect the American defense budget. By one estimate, the US accounts for about 45 percent of the world's military expenditures. Pressure to reduce these expenditures will increase over time, which will, in turn, affect the rest of the world because most defense spending supports missions that are of major importance to global security. Specifically, the personnel and weaponry paid for by the defense budget make a US military presence possible in three crucial regions - East Asia, Europe and the Middle East.
In the first two regions, that presence helps keep order by serving as a buffer between and among countries that are not actually hostile to one another but that harbor fears that hostility might someday arise. The American security role in Europe reassures the Western Europeans that if Russia should attempt to intimidate them, the United States will protect them as it did during the Cold War. At the same time, the American military presence in Europe and the enduring alliance with Germany reassure Russia that Germany itself, which invaded Russia twice in the first half of the 20th century, will not become an aggressive military power again.
The similar US role in East Asia reassures the countries there that they have a means of counterbalancing China, while reassuring China that Japan, like Germany an American ally and one that invaded and occupied the Chinese mainland in the 20th century, will not reprise its past pattern of conquest. The American military presence in both regions, although reduced from Cold War levels, enables the countries in each to feel that their region is safe and that they can behave accordingly, just as a policeman on patrol imparts a sense of security to a neighborhood. Any draw down of US forces in Asia will add to the nervousness of the countries of the region, which face an increasingly powerful and assertive China.
In the Middle East, American military power serves to contain Iran, whose government is deeply and openly committed to, and works actively for, overturning the existing political and economic arrangements in the region. An American military presence in some form will be necessary to deter Iran as long as the clerical regime holds power in that country, a presence that will be all the more urgently needed if that regime succeeds in its efforts to acquire nuclear weapons.
Growing US debt, and the measures necessary to cope with it, will make it more difficult to sustain American military deployments in each of these regions, and a substantial reduction of American forces in any of them could well have adverse political and economic consequences. An American withdrawal from East Asia or Europe could produce heightened suspicion, perhaps leading to arms races among the countries of these regions, which would threaten trade and investment in both. A diminished American presence in the Middle East could trigger a regional war, which would threaten the availability of its oil, on which the global economy depends.
In short, the impact on all countries, not only the United States, of the growing financial obligations of the American government could be serious indeed, especially since no other country or group of countries is willing or able to do what the United States does around the world. With so much wealth destroyed and with the sharp downturn in production, the direct, short-term economic consequences for the world of the September 15, 2008, events have already been severe. The indirect geopolitical consequences could, over the long run, turn out to be even worse.