“For selfish reasons, I couldn’t get the cognitive dissonance of that scene out of my mind. It was the summer of 2015, shortly after my 51st birthday. I was not world-famous like the man on the plane, but my professional life was going very well. I was the president of a flourishing Washington think tank, the American Enterprise Institute. I had written some best-selling books. People came to my speeches. My columns were published in The New York Times.