Theodor Julius Geiger (9 November 1891 in Munich, Germany – 16 June 1952) was a German socialist, lawyer and sociologist who studied Sociology of Law, social stratification and social mobility, methodology, and intelligentsia, among other things. He was Denmark's first professor of sociology, working at the University of Aarhus (1938–1940). Life Geiger grew up in Landshut, Bavaria, showing an interest in Scandinavia and a talent in Scandinavian languages from an early age. The son of a gymnasium teacher, Geiger studied law and political science, first at the University of Munich from 1910 to 1912, then from 1912 to 1914 at the University of Würzburg, where he received his doctorate in law. In 1914 Geiger voluntarily joined the army; he served until 1918 and was wounded. Simultaneously he wrote a dissertation on the supervision of criminals, Die Schutzaufsicht, supported by Friedrich Oetker. In 1918 he became a Doctor of Laws. In 1920 Geiger joined the Social Democratic Party of Germany (SPD). In the same year he became an assistant at the Statistischer Reichsamt, the statistics office, in Munich, working in the trade statistics department from 1924 to 1933. His home, however, was in Berlin, where he published the magazine Fremde Presse (Foreign Press), with news on the Reich ministry for the army from 1920 to 1929. At the same time he edited the information magazine of the newly founded Berlin Volkshochschule (adult education centre) where he had begun to work as a teacher. Geiger taught at Volkshochschule during a time when the institution was largely for the basic academic and cultural education of working class adults. Here he used the opportunity to focus on the social and political consequences of adult education by promoting critical thinking and intellectualism in his students. He eventually became principal but left in 1928 to take up the chair of Sociology at Brunswick Institute of Technology. Geiger had originally joined the Braunschweig University of Technology (Brunswick) in 1924, progressing from being a visiting lecturer, to an associate professor, and finally becoming a full professor of sociology in 1929; this was the first professorship of the department for cultural studies. Geiger's work is still kept at the "Theodor Geiger Archive" at the university. He worked there until 1933, when, due to his anti-Nazi beliefs, he had to emigrate to Denmark; here he lived until 1943, even obtaining Danish citizenship. In 1939, he wrote "Sociologi", which was for