Peniel Joseph signing a copy of Freedom Season. I went to the Kennedy Library expecting to hear history. I left thinking about words. At a talk with historian Peniel Joseph and Harvard professor Brandon Terry, the year 1963 came alive — the March on Washington, the murder of Medgar Evers, the bombing in Birmingham, Kennedy’s speech on civil rights. But what stayed with me was the idea of a “moral vocabulary.” It means having the words to tell the truth about what is wrong, to