Let’s set the record straight on Ronald Reagan’s campaign kickoff in 1980.

Early one morning in the late spring of 1964, Dr. Carolyn Goodman, her husband, Robert, and their 17-year-old son, David, said goodbye to David’s brother, Andrew, who was 20.

They hugged in the family’s apartment on the Upper West Side of Manhattan, and Andrew left. He was on his way to the racial hell of Mississippi to join in the effort to encourage local blacks to register and vote.

It was a dangerous mission, and Andrew’s parents were reluctant to let him go. But the family had always believed strongly in equal rights and the benefits of social activism. “I didn’t have the right,” Dr. Goodman would tell me many years later, “to tell him not to go.”

After a brief stopover in Ohio, Andrew traveled to the town of Philadelphia in Neshoba County, Mississippi, a vicious white-supremacist stronghold. Just days earlier, members of the Ku Klux Klan had firebombed a black church in the county and had beaten terrified worshipers.