Where did Donald Trump come from? Where is the GOP going? Should the whole thing be burned down? A lot had to go wrong before we got a President Trump. This fact, once broadly acknowledged, has gotten lost, as if a lot of people want it forgotten.

Mr. Trumps election came from two unwon wars, which constituted a historic foreign-policy catastrophe, and the Great Recession, which those in power, distracted by their mighty missions, didnt see coming until it arrived with all its wreckage. He came from the decadeslong refusal…