Kurt Lewin
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Lewin is often recognized as the "founder of social psychology" and was one of the first to study group dynamics and organizational development. A ''Review of General Psychology'' survey, published in 2002, ranked Lewin as the 18th-most cited psychologist of the 20th century. During his career, he was affiliated with several U.S. and European universities, including the University of Berlin, Cornell University, MIT, Stanford University, and the University of Iowa. Provided by Wikipedia