The forthcoming Group of 20 meeting is a make-or-break event. Unless it comes up with practical measures to support the less developed countries, which are even more vulnerable than the developed ones, markets are going to suffer another sinking spell just as they did last month when Tim Geithner, Treasury secretary, failed to produce practical measures to recapitalise the US banking system.

This crisis is different from all the others since the end of the second world war. Previously, the authorities got their act together and prevented the financial system from collapsing. This time, after the failure of Lehman Brothers last September, the system broke down and was put on artificial life support. Among other measures, both Europe and the US in effect guaranteed that no other important financial institution would be allowed to fail.