Martin Luther King Jr.
In 1951, King began doctoral studies in systematic theology at Boston University. While pursuing doctoral studies, King worked as an assistant minister at Boston's historic Twelfth Baptist Church with Rev. William Hunter Hester. Hester was an old friend of King's father, and was an important influence on King. In Boston, King befriended a small cadre of local ministers his age, and sometimes guest pastored at their churches, including the Reverend Michael Haynes, associate pastor at Twelfth Baptist Church in Roxbury (and younger brother of jazz drummer Roy Haynes). The young men often held bull sessions in their various apartments, discussing theology, sermon style, and social issues.