Three times in the few years since the global financial crisis erupted, the euro has come close to extinction, endangering both the world economy and history's most ambitious project in shared sovereignty. Yet each tim e, the case for a common currency proved to be more compelling than its weaknesses, and the euro survived. Saving Europe reveals how the nexus of international economics and national politics pushed monetary union to the brink of a breakup, how that disastrous development was avoided, and why the long-term viability of a common currency challenges politics as we know.