Abstract

The young French philosopher, Maurice Blondel, was fascinated by the vinculum substantiale hypothesis proposed by the late Leibniz in his correspondence with Bartolomeo Des Bosses, a Jesuit from Collegio Romano. What did young Blondel see in this intricate hypothesis? An answer to the question can be found by making a thorough critical analysis of two manuscripts of Blondel: «Première notule» and «Nota complementare». The focal point of these texts is the substantiality of the concrete individual. Blondel compares this with some passages from Aristotle's book Lambda in Metaphysics in his search for the «first substance» in its real and ontological sense. In fact, had Blondel known the twentieth century studies of book Zeta Metaphysics he could have found what he was seeking