Is this scenario plausible? Just consider what must be overcome: economic divergence and deepening recessions; irreversible balkanization of the banking system and financial markets; unsustainable debt burdens for public and private agents; daunting growth and balance-sheet costs in countries that pursue internal devaluation and deflation to restore competitiveness; asymmetrical adjustment, with moral-hazard risks in the core and insufficient financing in the periphery fueling incompatible political dynamics; fickle and impatient markets and investors; austerity fatigue in the periphery and bailout fatigue in the core; the absence of conditions for an optimal currency area; and serious difficulties in achieving full fiscal, banking, economic, and political union.