“A business man once stated that there is nothing so practical as a good theory.”

—  Kurt Lewin

Lewin (1943, 118), as cited in Karl E. Weick, "Theory and practice in the real world." in: The Oxford Handbook of Organization Theory, Tsoukas et al. (eds.), ‎Oxford University Press, 2003, p. 460; Also in Lewin, K. (1951). Field theory in social science: Selected theoretical papers (D. Cartwright, Ed.). New York, NY: Harper & Row
1940s

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Kurt Lewin 48
German-American psychologist 1890–1947

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