Given a slowing global economy, in which emerging markets are probably very grateful for any reserves they retain, this might seem an ill-timed question. But there is a good case to be made that a shift in emerging markets toward accumulating gold would help the international financial system function more smoothly and benefit everyone.

Just to be clear, I am not siding with those – usually American far-right crackpots – who favor a return to the gold standard, in which countries fix the value of their currencies in terms of gold. After all, the gold standard's last reign ended disastrously in the 1930s, and there is no reason to believe that a return to it would turn out any differently.