John Edward Mack was an American psychiatrist, writer, and professor. He served as the head of the Department of Psychiatry at Harvard Medical School from 1977 to 2004. In 1977, he won the Pulitzer Prize for his book A Prince of Our Disorder on T.E. Lawrence. His clinical expertise was in child psychology, adolescent psychology, and the psychology of religion. He was also known as a leading researcher on the psychology of teenage suicide and drug addiction, and he later became a researcher in the psychology of alien abduction experiences.