In the mid-1990s, he pointed out, the emerging economies of Asia had been major importers of capital, borrowing abroad to finance their development. But after the Asian financial crisis of 1997-98 (which seemed like a big deal at the time but looks trivial compared with what’s happening now), these countries began protecting themselves by amassing huge war chests of foreign assets, in effect exporting capital to the rest of the world.

The result was a world awash in cheap money, looking for somewhere to go.

Most of that money went to the United States — hence our giant trade deficit, because a trade deficit is the flip side of capital inflows. But as Mr. Bernanke correctly pointed out, money surged into other nations as well. In particular, a number of smaller European economies experienced capital inflows that, while much smaller in dollar terms than the flows into the United States, were much larger compared with the size of their economies.

Image Paul Krugman Credit... Fred R. Conrad/The New York Times

Still, much of the global saving glut did end up in America. Why?

Mr. Bernanke cited “the depth and sophistication of the country’s financial markets (which, among other things, have allowed households easy access to housing wealth).” Depth, yes. But sophistication? Well, you could say that American bankers, empowered by a quarter-century of deregulatory zeal, led the world in finding sophisticated ways to enrich themselves by hiding risk and fooling investors.

And wide-open, loosely regulated financial systems characterized many of the other recipients of large capital inflows. This may explain the almost eerie correlation between conservative praise two or three years ago and economic disaster today. “Reforms have made Iceland a Nordic tiger,” declared a paper from the Cato Institute. “How Ireland Became the Celtic Tiger” was the title of one Heritage Foundation article; “The Estonian Economic Miracle” was the title of another. All three nations are in deep crisis now.