The Geistkreis ("Mind Circle") was an informal Viennese seminar of science and ideas founded by

Friedrich Hayek Friedrich August von Hayek (8 May 1899 – 23 March 1992) was an Austrian-born British academic and philosopher. He is known for his contributions to political economy, political philosophy and intellectual history. Hayek shared the 1974 Nobe ...

and Herbert Furth in the early 1920s, whose members included sociologist Alfred Schutz, philosopher Felix Kaufmann, economists

Fritz Machlup Fritz Machlup (; ; born Friedrich Eduard Machlup; December 15, 1902 – January 30, 1983) was an Austrian-American economist known for his work in information economics. He was President of the International Economic Association from 1971 to 19 ...

, Gottfried Haberler and

Oskar Morgenstern Oskar Morgenstern (; January 24, 1902 – July 26, 1977) was a German-born economist. In collaboration with mathematician John von Neumann, he is credited with founding the field of game theory and its application to social sciences and strategic ...

, political scientist

Eric Voegelin Eric Voegelin (born Erich Hermann Wilhelm Vögelin, ; January 3, 1901 – January 19, 1985) was a German-American political philosopher. He was born in Cologne, and educated in political science at the University of Vienna, where he became an ass ...

, Friedrich Engel-Janosi, Franz Glück, mathematician

Karl Menger Karl Menger (; January 13, 1902 – October 5, 1985) was an Austrian-born American mathematician, the son of the economist Carl Menger. In mathematics, Menger studied the theory of algebra over a field, algebras and the dimension theory of low-r ...

, art historians

Otto Benesch Otto Benesch (29 June 1896 in Ebenfurth – 16 November 1964 in Vienna) was an Austrian art historian. He was taught by Max Dvořák and is considered a member of the Vienna School of Art History. He is well known for his catalogue of Rembrandt ...

and Johannes Wilde, among others.Herbert Furth Biographical Sketch
M. E. Grenander Department of Special Collections & Archives / University Libraries / University at Albany / State University of New York The members of the circle presented papers on mathematics, the natural science, sociology, history, philosophy, art, literature, neuroscience, economics, among other intellectual topics. The members met once or twice a month to discuss technical and theoretical subjects from across the world of ideas. The circle was first formed in 1921 and continued to meet in one form or another until 1938. Over the course of that period 25 individuals participated in the circle. Peter Kurrild-Klitgaard
"The Viennese Connection: Alfred Schutz and the Austrian School".
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References

Organisations based in Vienna 1921 establishments in Austria 1920s in Vienna 1930s in Vienna 1938 disestablishments in Austria {{Austria-org-stub