Harvard professor Henry Louis Gates Jr. reviews the long debate about how to teach Black history in an article in the New York Times. The debate began as rationales by sympathizers of the Confederacy, who changed the Civil War into “The War Between the States.” In a visit to Charleston, South Carolina, not long ago, I heard the war described in a historic home as “The War of Northern Aggression.”

Dr. Gates writes:

Lurking behind the concerns of Ron DeSantis, the governor of Florida, over the content of a proposed high school course in African American studies, is a long and complex series of debates about the role of slavery and race in American classrooms.

“We believe in teaching kids facts and how to think, but we don’t believe they should have an agenda imposed on them,” Governor DeSantis said. He also decried what he called “indoctrination.”

School is one…