Jean Piaget By kat1992 Jan 1, 1907 Jean Peaget He writes a short story Jan 29, 1929 Jean Piaget Chairman for the Bureau of Education Jan 1, 1939 Jean Piaget Chairmen of Sociology at Geneva Jan 1, 1940 Jean Piaget Chairment of Genetic and experimental Psychology Sep 15, 1980 Jean Piaget Diie