For all the embrace of identity politics at home, abroad Obama has preached the opposite. Here is a man telling a black audience in September that he would "consider it a personal insult, an insult to my legacy" if they don't turn out for the Democratic candidate in November. Yet on his valedictory tour abroad just nine weeks later, he lectures anyone who will listen on the sins of parochialism. His urgent message for the nations of the world, including his own, is to eschew "tribalism" in the name of a common universalism.