Kris not only practiced as a psychoanalyst, he also worked as an art historian and published articles on art history. As a psychoanalyst, he made some important contributions to the psychology of the artist and the psychoanalytic interpretation of works of art and caricature. In 1928, Kris intensified his working relationship with Freud, and he became a member of the Vienna Psychoanalytic Society. Between 1930 and 1938, Kris worked as a lecturer at the Vienna Psychoanalytic Institute. In 1933, Freud asked Kris to become editor of the Imago magazine, in which he published a paper relating art to psychology in 1936. He argued that the difference between the artist and the psychotic is that the artist can return from the world of his imagination to the real world, while the psychotic cannot. In 1938, Kris fled to England, after Hitler invaded Austria. In England he became a lecturer and training analyst at the London Institute of Psychoanalysis, until 1940. In 1940, Kris and his family moved to New York, where he became a visiting professor at the New School for Social Research, where he founded the Research Project on Totalitarian Communication (1941–44) alongside Hans Speier.[4] In 1943 he began to work as a lecturer at the New York Psychoanalytic Institute and the College of the City of New York. In 1945 he co-founded the journal The Psychoanalytic Study of the Child with Anna Freud and Marie Bonaparte. Kris dedicated the last years of his life to the psychoanalytic theory, ego psychology, early childhood development and a theory of psychoanalytic technique. Kris was one of the first developers of the new ego psychology, a school of psychoanalysis that originated in Freud's ego-superego-id model. He proposed a new way to enter the unconscious; not via a fast and immediate entrance, but via exploration by the surface. It consists of exposing defense mechanisms and not of exploring the id. Kris died in New York City in 1957.