This past month may be remembered as the moment the United States lost its role as the underwriter of the global economic system. True, there have been any number of periods of frustration for the US before, and times when American behaviour was hardly multilateralist, such as the 1971 Nixon shock, ending the convertibility of the dollar into gold. But I can think of no event since Bretton Woods comparable to the combination of China’s effort to establish a major new institution and the failure of the US to persuade dozens of its traditional allies, starting with Britain, to stay out of it.

This failure of strategy and tactics was a long time coming, and it should lead to a comprehensive review of the US approach to global economics. With China’s economic size rivalling America’s and emerging markets accounting for at least half of world output, the global economic architecture needs substantial adjustment. Political pressures from all sides in the US have rendered it increasingly dysfunctional.

Largely because of resistance from the right, the US stands alone in the world in failing to approve the International Monetary Fund governance reforms that Washington itself pushed for in 2009. By supplementing IMF resources, this change would have bolstered confidence in the global economy. More important, it would come closer to giving countries such as China and India a share of IMF votes commensurate with their new economic heft.