Disruptive. That’s a good word to describe Donald Trump’s presidential candidacy, and to describe the sometimes ramshackle Republican National Convention his campaign more or less superintended in Cleveland this past week.

Apple disrupted the music industry, Uber disrupted the taxi cartels, Amazon disrupted the megabookstores. Global competition has been disrupting American manufacturing for decades. The inundation of low-skill immigrants unintentionally produced by the 1965 immigration act has disrupted many communities and big metro areas.