The great Swiss psychologist and theorist Jean Piaget (1896-1980) had much to say about the developing mind. He also had plenty to say about his own development, much of it, as Fernando Vidal shows, plainly inaccurate. In the first truly historical biography of Piaget, Vidal tells the story of the psychologist's intellectual and personal development up to 1918. By exploring the philosophical, religious, political, and social influences on the psychologist's...