Kersten Reich is a University Professor at the University of Köln and the founder of the Interactive Constructivism, a brand of constructivism that is culturally orientated and stands in proximity with pragmatism (especially Deweyan pragmatism). He is co-director of the Dewey-Center at the University of Cologne. He is the author of over 120 papers and 30 books, including some on Dewey, Interactive Constructivism, and more recently on sustainability.