SELECTED PAPERS ON GROUP DYNAMICS This is the first of two volumes of collected writings by Kurt Lewin which are intended to bring together for convenient reading a number of papers he published during the .fifteen years he lived in the United States. During this period his scientific interests centered more and more upon problems of social psychology and group dynamics. These two volumes are intended to give a balanced survey of his work, interests, and aims in the study of society, rather than to provide a complete collection of his writings.