This essay investigates whether there is the possibility of finding in a passage of modern philoso-phy a Leibnizian perspective, i.e. a Leibnizian “sign” able to connote it. This would be almost a prognostic trace, which could reveal at least part of the path that led to the development of a fundamental text for the narrative of modern-contemporary (political, legal, moral) philosophy, comparable to the Kantian Project for Perpetual Peace.