It was the political decisions made by European leaders that ultimately put the solvency of individual countries at risk. The single gravest error in the EU crisis-resolution process was the decision by eurozone leaders back in October 2008, following the collapse of Lehman Brothers, to pursue a chacun-pour-soi (every-man-for-himself) approach to banking resolution: Each country would guarantee its own banks. With that decision, the banking crises in the eurozone's periphery became a series of contagious, national fiscal crises. If eurozone leaders had set up a eurozone-wide rescue fund for ailing banks, accompanied by a bank resolution regime, the crisis would have remained contained in the private sector. If the EU had sorted out the banks back then, it could have chosen among a variety of options in dealing with the one genuine fiscal crisis it had in Greece.

