Abstract
A number of recent authors have raised the question of Leibniz’s commitment, during the 1680s and after, to the reality of corporeal substances. In contrast to the standard reading of him as embracing early on a view of substance which is in all essential respects that of the “Monadology”, it has been argued that Leibniz is in fact inclined to recognize two distinct types of substance: on the one hand, unextended soul-like substances ; on the other hand, quasi-Aristotelian corporeal substances. Some commentators have seen Leibniz as deciding definitively by the late 1690s in favor of the monadic theory. Others, however, have argued for a more complicated reading of his development, seeing Leibniz as struggling with the problem of corporeal substance for much of his career.