The writers differ in whether this is only Greece or a host of other countries. Some have UK cabinet experience, some Nobel prizes in economics and hail from the left, the right and the centre of the political spectrum.
But all believe the currency will lose members – starting in Athens.
German FDP MP Frank Schaeffler, a member of the finance committee in the German Parliament, says Berlin should help Greece to exit. „If Greece wants to leave the euro zone, that is its own autonomous decision. And Germany should accompany them constructively,“ he said in May.