The role of social interaction in Piagets theory: language for social cooperation and social cooperation for language

Reflecting on Piagetʹs recently translated collection of sociological studies, we highlight some salient points in his approach to sociological issues. At the same time we attempt to explain the contrast between Piagetʹs singular influence in cognitive and developmental psychology with nothing comparable in empirical sociology. We believe that our own social research is a genuine continuation of what had remained on a speculative level in Piaget. One of us focused on the constructive, the other on the interrelational aspect of Piagetʹs thought.