Kurt Lewin (1890 -1947)
A German-born psychologist, Karl Lewin studied mathematics and physics at Berlin and received his doctorate in 1914 under the supervision of Carl Stumpf. He was an early disciple in the Gestalt psychology movement. He moved to the United States in 1932, and taught at Stanford, Cornell, Iowa, and MIT. He is best known for applying field theory to problems of group dynamics and social psychology, and was the first to investigate the problem of conflict experimentally. Lewin is known as the father of social psychology.