Felix Krueger, a German philosopher and psychologist, was born in Poznán and received his doctorate in 1897 from the University of Munich, where he studied under Hans Cornelius and Theodor Lipps. After working as an assistant at the Physiological Institute in Kiel he became a Privatdozent at Leipzig under Wilhelm Wundt. From 1906 to 1908 Krueger held a professorship at Buenos Aires, where he organized the development of scientific psychology in Argentina and left lasting traces of his views and activities. After returning to Leipzig he was called to Halle to succeed Hermann Ebbinghaus. In 1912–1913 Krueger was an exchange professor at Columbia University. In 1917, after three years of military service, he returned to Leipzig as Wundt's successor. At Leipzig Krueger founded the second Leipzig school of psychology, whose basic principles were designated as a genetic psychology of wholeness and structure (genetische Ganzheitsund Strukturpsychologie). In 1928 he received...