Sigmund Freud (1856-1939) was the founder of the psychoanalytic school of psychology. One of the most influential figures of twentieth century thought, Freud won followers and made enemies with his bold theories of the unconscious and the importance of sexual impulses, as well as the tripartite structure of id, ego, and superego.
Abraham Arden Brill (1874-1948) was an Austrian-born psychiatrist who immigrated to the United States at age thirteen. He graduated from New York University and earned his M.D. at Columbia University, teaching at both institutions later in life. After studying with Jung, he became a prominent spokesman for psychoanalysis. He translated most of Freud’s major works.