Shifts in global economic dominance are by nature tectonic and never precipitated by single events. The Great Recession of 2008-09, however, has presented the European Union, its common currency the euro, and the United States with new global challenges. The transatlantic partnership has dominated the world economy since the early 20th century and, based upon US and European values and interests, has designed and sustained all its principal global political and economic institutions. But countries outside the European Union and United States now account for about half of the world economy,...