In the spring of 1973, in a public school in Lincoln, Nebraska, a teacher handed me a paper armband and told me to wear it for the rest of the day. Mine was blue, and it carried a single printed letter, an "S." The children with brown eyes wore brown bands lettered "M". No one explained the letters to a room of eight-year-olds. I have spent the rest of my life arriving at what they meant. "M" for Master. "S" for Slave. The next morning the roles reversed, and the children who had ruled became the ruled. No one in that room was Black. The teacher said the lesson was empathy.
I want to talk today about the book I built out of that morning, and out of fifty years of watching that morning return in new costumes. It is called Not My Thing: How We Teach Cruelty to Cure It, from the Armband to the Diversity Seminar. That armband was one early specimen of a method that has since grown into an industry.