Heinz Hartmann (1894–1970) was an Austrian-born psychiatrist and psychoanalyst, one of the founders and principal representatives of ego psychology. He trained in psychiatry at the Vienna university clinic of Julius Wagner-Jauregg, was analysed first by Sándor Radó and then by Sigmund Freud, and became one of the leading younger members of the Vienna Psychoanalytic Society. In November 1937 he read a paper to the society, published in 1939 as Ich-Psychologie und Anpassungsproblem1. It argued that psychoanalysis should study not only the ego's conflicts with the drives but also the functions that develop outside conflict, and it brought the conflict-free ego sphere and the average expectable environment into psychoanalytic theory.
Hartmann left Vienna in 1938 and settled in New York in 1941. There, with Ernst Kris and Rudolph Loewenstein, he wrote a series of joint papers that set out a general psychoanalytic theory of the ego. In his own papers of the 1950s he developed the ideas of ego autonomy and neutralization and distinguished the ego from the self. These papers were collected in Essays on Ego Psychology2 (1964). He was president of the International Psychoanalytical Association from 1951 to 1957 and was later made its honorary president for life.
The ego psychology he shaped dominated American psychoanalysis for decades. Later theories of the self and of object relations took it as a starting point, and Jacques Lacan made it a main target of his critique.