Abstract

In this paper, I comment, in the last letters exchanged between Tschirnhaus and Spinoza, the criticism of the latter to Descartes ́s notion of extension, and the correlation of this criticism with the spinozistic theory of genetic definition. I propose that such a correlation express, in the physical and logical contexts, the spinozistic solution for the classical problem known as “problem of the One and the Many”, in the ontological context.