"Apartheid South Africa was on fire around me."

So begins the memoir of Career Foreign Service Officer Edward J. Perkins, the first black United States ambassador to South Africa. In 1986, President Ronald Reagan gave him the unparalleled assignment: dismantle apartheid without violence.

As he fulfilled that assignment, Perkins was scourged by the American press, despised by the Afrikaner government, hissed at by white South African citizens, and initially boycotted by black South African revolutionaries, including Archbishop Desmond Tutu. His advice to...