When the euro was first issued in 1999, members of the euro zone relished the idea that it might make a dent in the U.S. dollar's status as the world's premier reserve currency. Ironically, that may be the last thing the EU wants to see happen today. Restored pride aside, a wider adoption of the euro as a reserve currency means that dollars would be sold to buy euros. An even stronger euro now would be as welcome as a return of the plague. Europe is lagging the U.S. in growth at exactly the same time the dollar is falling...