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  Jean Piaget was born in Neuchâtel (Switzerland).
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  Piaget returned to Switzerland as director of the Rousseau Institute in Geneva
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  married Valentine Châtenay
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  professor of psychology, sociology, and the philosophy of science at the University of Neuchatel
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  created the International Center for Genetic Epistemology in Geneva in 1955
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  Piaget was invited to serve as chief consultant at two conferences at Cornell University
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  He died in Geneva on September 16, 1980