The Kaiser Wilhelm Society for the Advancement of Science (German Kaiser-Wilhelm-Gesellschaft zur Förderung der Wissenschaften) was a German scientific institution established in the German Empire in 1911. Under the Third Reich it was involved in Nazi scientific operations, and after the Second World War concluded, its functions were taken over by the Max Planck Society. The Kaiser Wilhelm Society was an umbrella organisation for many institutes, testing stations, and research units created under its authority.
The Kaiser Wilhelm Gesellschaft (KWG) was founded in 1911 in order to promote the natural sciences in Germany, by founding and maintaining research institutions formally independent from the state and its administrations. The institutions were to be under the guidance of prominent directors, which included luminaries such as Walther Bothe, Peter Debye, Albert Einstein, Fritz Haber and Otto Hahn; a board of trustees also provided guidance.
Funding was ultimately obtained from sources internal and external to Germany. Internally, money was raised from individuals, industry and the government, as well as through the Notgemeinschaft der Deutschen Wissenschaft (Emergency Association of German Science).
External to Germany, the Rockefeller Foundation granted students worldwide one-year study stipends, for whichever institute they chose, some studied in Germany. In contrast to the German universities with their formal independence from state administrations, the institutions of the Kaiser Wilhelm Gesellschaft had no obligation to teach students.
The Kaiser Wilhelm Institute and its research facilities were involved in weapons research, experimentation and production in both the First World War and the Second World War.
By the end of the Second World War, the KWG and its institutes had lost their central location in Berlin and were operating in other locations. The KWG was operating out of its Aerodynamics Testing Station in Göttingen. Albert Vögler, the president of the KWG, committed suicide on 14 April 1945. Thereupon, Ernst Telschow assumed the duties until Max Planck could be brought from Magdeburg to Göttingen, which was in the British zone of the Allied Occupation Zones in Germany. Planck assumed the duties on 16 May until a president could be elected. Otto Hahn was selected by directors to be president, but there were a number of difficulties to be overcome. Hahn, being related to nuclear research had been captured by the allied forces of Operation Alsos, and he was still interned at Farm Hall in Britain, under Operation Epsilon. At first, Hahn was reluctant to accept the post, but others prevailed upon him to accept it. Hahn took over the presidency three months after being released and returned to Germany. However, the Office of Military Government, United States (OMGUS) passed a resolution to dissolve the KWG on 11 July 1946.