"It is in Leibniz that Tarde finds the main conditions for the metaphysics of possession.He sees in Monadology (1714) the beginning of a movement of dissolution of classical ontology (notably the identity of “being” and “simplicity”), which would, in a still implicit and unthinking form, find its most obvious confirmation in today’s science.The Dynamics of Possession: An Introduction to The Sociology of Gabriel Tarde" by Didier Debaise