People usually get the rulers they deserve, or at least those who reflect them or their era. At a time when most people seem to suffer from an induced chronic attention deficit disorder, it is fit for a king to rant his vague train of thoughts in 140 characters on a social-media platform. King Donald’s economic adviser and formerly the Duke of Goldman Sachs, Gary Cohn, commented about his ruler’s first trip abroad with the laconic statement: “He came here to learn, he came here to get smart. His views are evolving, which is exactly as they should be.” On all occasions during the trip, however, King Donald’s comportment suggested that not only did he not learn anything at all or get smart, but also that he had not acquired the manners that make social life possible…