Armand M. Nicholi II, M.D., (1927–2017) was Clinical Professor of Psychiatry in the Massachusetts General Hospital at Harvard Medical School, and a member of the Board of Advisors for the Center on Culture and Civil Society at the Independent Institute.

Professor Nicholi is the author of the book, The Question of God: C.S. Lewis and Sigmund Freud Debate God, Love, Sex and the Meaning of Life, which was the basis for the 4-part PBS series in 2004, The Question of God: Sigmund Freud and C.S. Lewis.

His other books include The Harvard Guide to Psychiatry and The New Harvard Guide to Psychiatry.