Sue Bailey Thurman was an American author, lecturer, historian and civil rights activist. She was the first non-white student to earn a bachelor's degree in music from Oberlin College, Ohio. She briefly taught at the Hampton Institute in Virginia, before becoming involved in international work with the YWCA in 1930. During a six-month trip through Asia in the mid-1930s, Thurman became the first African-American woman to have an audience with Mahatma Gandhi. The meeting with Gandhi inspired Thurman and her husband, theologian Howard Thurman, to promote non-violent resistance as a means of creating social change, bringing it to the attention of a young preacher, Martin Luther King Jr. While she did not actively protest during the Civil Rights Movement, she served as spiritual counselors to many on the front lines, and helped establish the first interracial, non-denominational church in the United States.

Howard Washington Thurman was an American author, philosopher, theologian, Christian mystic, educator, and civil rights leader. As a prominent religious figure, he played a leading role in many social justice movements and organizations of the twentieth century. Thurman's theology of radical nonviolence influenced and shaped a generation of civil rights activists, and he was a key mentor to leaders within the civil rights movement, including Martin Luther King Jr.