In 1917, a new German Institute for Psychiatric Research was established in Munich (known as the DFA in German; renamed the Max Planck Institute of Psychiatry after World War II), designed and driven forward by Emil Kraepelin. The Institute incorporated a Department of Genealogical and Demographic Studies (known as the GDA in German) – the first in the world specialising in psychiatric genetics – and Rüdin was put in charge by overall director Kraepelin. In 1924, the Institute came under the umbrella of the prestigious Kaiser Wilhelm Society. From 1925, Rüdin spent three years as full Professor of Psychology at Basel, Switzerland. He returned to the Institute in 1928, with an expanded departmental budget and new building at 2 Kraepelinstrasse, financed primarily by the American Rockefeller Foundation. The institute soon gained an international reputation as leading psychiatric research, including in hereditary genetics. In 1931, a few years after Kraepelin's death, Rüdin took over the directorship of the entire Institute as well as remaining head of his department.