Abstract
The substantial vinculum is for Leibniz the relation where the simple substances join to create a compound from which a collective substantiality arises, and it is not the simple addition of individuals substantialities. The vinculum is essential, determinant for the compound, but not for the simple thing. The connective thing turns definitive in the compound thing, so that the ontology of Leibniz bets strongly for the simple thing, for the individual thing, as update of the infinitesimal thing.