http://www.newsweek.com/id/224694

We won the cold war and weathered 9/11. But now economic weakness is endangering our global power.

Call it the fractal geometry of fiscal crisis. If you fly across the Atlantic on a clear day, you can look down and see the same phenomenon but on four entirely different scales. At one extreme there is tiny Iceland. Then there is little Ireland, followed by medium-size Britain. They're all a good deal smaller than the mighty United States. But in each case the economic crisis has taken the same form: a massive banking crisis, followed by an equally massive fiscal crisis as the government stepped in to bail out the private financial system.

Size matters, of course. For the smaller countries, the financial losses arising from this crisis are a great deal larger in relation to their gross domestic product than they are for the United States. Yet the stakes are higher in the American case. In the great scheme of things—let's be frank—it does not matter much if Iceland teeters on the brink of fiscal collapse, or Ireland, for that matter. The locals suffer, but the world goes on much as usual.

But if the United States succumbs to a fiscal crisis, as an increasing number of economic experts fear it may, then the entire balance of global economic power could shift. Military experts talk as if the president's decision about whether to send an additional 40,000 troops to Afghanistan is a make-or-break moment. In reality, his indecision about the deficit could matter much more for the country's long-term national security. Call the United States what you like—superpower, hegemon, or empire—but its ability to manage its finances is closely tied to its ability to remain the predominant global military power. Here's why.

The disciples of John Maynard Keynes argue that increasing the federal debt by roughly a third was necessary to avoid Depression 2.0. Well, maybe, though some would say the benefits of fiscal stimulus have been oversold and that the magic multiplier (which is supposed to transform $1 of government spending into a lot more than $1 of aggregate demand) is trivially small.

Credit where it's due. The positive number for third-quarter growth in the United States would have been a lot lower without government spending. Between half and two thirds of the real increase in gross domestic product was attributable to government programs, especially the Cash for Clunkers scheme and the subsidy to first-time home buyers. But we are still a very long way from a self--sustaining recovery. The third-quarter growth number has just been revised downward from 3.5 percent to 2.8 percent. And that's not wholly surprising. Remember, what makes a stimulus actually work is the change in borrowing by the whole public sector. Since the federal government was already running deficits, and since the states are actually raising taxes and cutting spending, the actual size of the stimulus is closer to 4 percent of GDP spread over the years 2007 to 2010—a lot less than that headline 11.2 percent deficit.

Meanwhile, let's consider the cost of this muted stimulus. The deficit for the fiscal year 2009 came in at more than $1.4 trillion—about 11.2 percent of GDP, according to the Congressional Budget Office (CBO). That's a bigger deficit than any seen in the past 60 years—only slightly larger in relative terms than the deficit in 1942. We are, it seems, having the fiscal policy of a world war, without the war. Yes, I know, the United States is at war in Afghanistan and still has a significant contingent of troops in Iraq. But these are trivial conflicts compared with the world wars, and their contribution to the gathering fiscal storm has in fact been quite modest (little more than 1.8 percent of GDP, even if you accept the estimated cumulative cost of $3.2 trillion published by Columbia economist Joseph Stiglitz in February 2008).

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