But Trump has no actual ideas or policies. There is no army of Trumpists out there to carry on his legacy. He will almost certainly go down to a devastating defeat, either in the general election or — God help us — as the worst president in American history.

At that point the G.O.P. will enter what Kuhn called the revolution phase. During these moments you get a proliferation of competing approaches, a willingness to try anything. People ask different questions, speak a different language, congregate around a new paradigm that is incommensurate with the last.

That’s where the G.O.P. is heading. So this is a moment of anticipation. The great question is not, Should I vote for Hillary or sit out this campaign? The great question is, How do I prepare now for the post-Trump era?

The first step clearly is mental purging: casting aside many existing mental categories and presuppositions, to shift your identity from one with a fixed mind-set to one in which you are a seeker and open to anything. The second step is probably embedding: going out and seeing America again with fresh eyes and listening to American voices with fresh ears, paying special attention to that nexus where the struggles of Trump supporters overlap with the struggles of immigrants and African-Americans.