Soggetto, verità e mondo. Heidegger e il leibniziano "mundus concentratus"

This article aims to understand Heidegger’s reflection on subject, truth and world, thanks to his comparison with Leibniz. In order to intend this, the article faces the course of 1928 named Metaphysische Anfangsgründe der Logik, where Heidegger delineates and explains his research on a Fundamentalontologie starting from Leibniz’s thought concerning truth and substance. The correlation of these questions allows to understand the original monadological conception of being in Leibniz, in which Heidegger finds the ground for a revolutionary interpretation of subject – intended as impulse – as essentially related to the world, or better, in Leibnizian terminology, as mundus concentratus.