Otto Selz was one of the greatest German psychologists. His wide-ranging interests included questions of theoretical as well as applied psychology. He was also a philosopher and, as a senior academic staff member (Privatdozent), gave lectures on philosophical topics. Later on, he held the Chair of Philosophy, Psychology, and Pedagogy. In the works he focuses on the psychology of thinking. In 1929, he became the President of the Handelshochschule Mannheim (later renamed as University of Mannheim). In 1930, he had to resign from this position due to his Jewish ancestry. On 27 August 1943, he was killed in the Auschwitz concentration camp.