IT MAY BE OUR CURRENCY, BUT IT'S YOUR PROBLEM

The dollar's dominance of international transactions and role as a reserve currency is an exorbitant privilege that is a burden as well as a blessing for the US. It achieved this dominance early in the twentieth century, quite quickly in fact; it may also see that status change equally quickly were the world to move to a multipolar system of currencies. Among the most likely candidates for reserve currencies in such a world are the dollar, the euro, and the Chinese renminbi, Barry Eichengreen explained in his Butlin Lecture earlier in 2011.