Let us stipulate at the outset that Donald Trump is a vulgar and dishonest fraud without a principled bone in his corpulent frame. Yet history is nothing if not a tale overflowing with irony. Despite his massive shortcomings, President Trump appears intent on recalibrating America's role in the world. Initiating a long-overdue process of aligning U.S. policy with actually existing global conditions just may prove to be his providentially anointed function. Go figure.