Margaret Schönberger Mahler (May 10, 1897 in Ödenburg, Austria-Hungary; October 2, 1985 in New York) was an Austrian-American psychiatrist, psychoanalyst, and pediatrician. She did pioneering work in the field of infant and young child research. On the basis of empirical studies, she developed a development model that became particularly influential in psychoanalysis and Object relations theory. Mahler developed the separation–individuation theory of child development.
Born Margaret Schönberger on May 10, 1897, into a jewish family in Ödenburg, a small town near Vienna to Gustav Schönberger, an Austrian physician and president of the Jewish community, one of the notables of Ödenburg, and Eugenia Schönberger, née Wiener. She and a younger sister had a difficult childhood as a result of their parents' troubled marriage. Margaret's father, however, encouraged her to excel in mathematics and other sciences. After completing the Höhere Mädchenschule, she attended Vaci Utcai Gimnazium in Budapest, even though it was unusual at the time for a woman to continue formal education. Budapest was of great influence on her life and career. She met the influential Hungarian psychoanalyst Sándor Ferenczi, became fascinated by the concept of the unconscious, and was encouraged to read Sigmund Freud.
In September 1916, she began Art History studies at the University of Budapest, but in January 1917 switched to the Medical School. Three semesters later she began medical training at the university of Munich, but was forced to leave because of Antisemitism. In spring 1920 she transferred to the university of Jena and it was there that she began to realize how important play and love were for infants in order for them to grow up mentally and physically healthy. After graduating cum laude in 1922, she left for Vienna in order to get her license to practice medicine. There she turned from pediatrics to psychiatry and, in 1926, started her training analysis with Helene Deutsch. Seven years later, she was accepted as an analyst.