Paul Krugman: Greece Over the Brink

It has been obvious for some time that the creation of the euro was a terrible mistake. Europe never had the preconditions for a successful single currency — above all, the kind of fiscal and banking union that, for example, ensures that when a housing bubble in Florida bursts, Washington automatically protects seniors against any threat to their medical care or their bank deposits.

Leaving a currency union is, however, a much harder and more frightening decision than never entering in the first place, and until now even the Continent’s most troubled economies have repeatedly stepped back from the brink. Again and again, governments have submitted to creditors’ demands for harsh austerity, while the European Central Bank has managed to contain market panic.