By situating Descartes within the history of the discourse on being, Marion brings into relief the grey ontology that lies at the origins of Cartesian science. Grey because it is never made explicit; grey because its "objects" are the impoverished shadows of Aristotelian "things"; grey because it never takes the full measure of itself. Within this history, then, the Regulae inaugurates a new era, where Descartes's own metaphysics and his conception of the divine become profoundly ambivalent.
In revealing the origins and presuppositions of Cartesian science, Descartes's Grey Ontology reveals us – we moderns – to ourselves. At the same time, it is an introduction to contemporary Cartesian scholarship in France, revitalized since its publication, and it is an introduction to the thought of one of France's premier philosophers, whose oeuvre brings together the history of philosophy, phenomenology, and theology. A number of Marion’s works have already been translated into English, many of them billed as an introduction to his thought. But this work of Cartesian scholarship, Marion's Ph.D. dissertation, provides the reader with a window into the genesis of that thought. This translation reproduces the third edition of the French original. Between 1975 and the third edition, Marion's rethinking of the consequences of Descartes's grey ontology produced Sur la théologie blanche de Descartes (forthcoming from St. Augustine's Press).
