Jean Piaget published as a child numerous biological essays, which he became in a few years to become an internationally respected expert. These were based mainly it began already with ten years perennial assistant to the director of the local Museum of Natural History and its made against this background specializing in the mollusc customer. His studies in biology at the University of Neuchâtel, he completed at the age of 22 years with a doctorate. From about his sixteenth birthday dealt Piaget, who was rooted to in his early adult years in Protestantism its western native Switzerland, also intensively with philosophy, what him but less led to a re-orientation as to the fact that he no longer biological for the problem the adaptation of the organism interested in his environment, but in biology saw the explanation of all things and the mind itself, and finally the decision took to dedicate his life to the biological explanation of knowledge. In 1921 he was appointed to the University of Geneva, at the Institute J.-J. Rousseau, whose director he was from 1933 to 1971. In 1923, he married Valentine Châtenay. His three children were him, among other appropriate objects of study for his pioneering research into the development of intelligence from birth to language acquisition. He was from 1929 to 1954 professor of psychology at the University of Geneva and then head of the formed in 1955, "Centre International d'epistemology Génétique", also in Geneva. He also held professorships at the University of Neuchâtel and at the Sorbonne in Paris held.

https://de.wikipedia.org/wiki/Jean_Piaget