After more than 18 months, a dozen and a half summits, multiple rounds of austerity, a trillion dollars of liquidity, and now elections in Greece and France that threaten to overturn the fragile policy consensus in Europe, the Euro-crisis rumbles on. How it could end, badly, with a bank run through the European bond market or the collapse of confidence around Greece, Spain or Italy, is well understood. What is less well understood is how to resolve it.