Bill Thetford was an American psychologist and educator, best known for his role in the development of the spiritual and self-help text, A Course in Miracles. He collaborated with Helen Schucman, a fellow psychologist, who claimed to have received the text through a process of inner dictation. Thetford's work focused on the integration of psychology and spirituality. Born in 1923, Thetford served as a professor at Columbia University and was influential in the field of psychology. His partnership with Schucman led to the publication of A Course in Miracles in 1976, which has since gained a significant following and has been translated into multiple languages.