Any event that makes a euro exit by Greece — the most heavily indebted member state, which is off track on its second bailout program and in the fifth year of a recession — seems bound to accelerate those flows, despite repeated statements by EU leaders that Greece is a unique case. “If it does occur, a crisis will propagate itself through the TARGET payments system of the European System of Central Banks,” U.S. economist Peter Garber, now a global strategist with Deutsche Bank, wrote in a prophetic 1999 research paper. Either member governments would always be willing to let their national central banks give unlimited credit to each other, in which case a collapse would be impossible, or they might be unwilling to provide boundless credit, “and this will set the parameters for the dynamics of collapse,” Garber warned.