I publicly renounced my allegiance to the theology of standards, tests, and choice in 2010 by publishing “The Death and Life of the Great American School System: How Testing and Choice Are Undermining Education.” It caused a stir, and I was asked again and again, why did you change your mind. I thought I had answered the question in my book, but nonetheless people asked again. I was interviewed by Kathryn Schultz, who is now on staff at The New Yorker, because she had published a book about what she called “wrongology,” and how people come to admit their errors in big things.

So whenever I learn of someone who changes course and says so in public, I am interested in learning what persuaded them.

Here is a man who was in the forefront of climate change denial. He changed his mind.