Abstract

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:Leibniz and the Natural World: Activity, Passivity, and Corporeal Substances in Leibniz’s PhilosophyMichael FutchPauline Phemister. Leibniz and the Natural World: Activity, Passivity, and Corporeal Substances in Leibniz’s Philosophy. New Synthese Historical Library, 58. Dordrecht: Springer, 2005. Pp. xiii + 293. Cloth, $149.00.Leibniz's metaphysics has long been viewed as one of the more noteworthy systems of idealism in early modern philosophy. At the ground-floor level of his austere ontology, the standard view maintains that the world is not populated by bodies in space and time, but rather by immaterial, mind-like entities: monads. All the rest is a kind of ontological construction from these simple substances. In this book, Pauline Phemister seeks to overturn the idealist reading of Leibniz and to show that "the true immaterial substances in Leibniz's philosophy" are "monads that exist as animated corporeal creatures" (76). What is ontologically basic for Leibniz are not immaterial monads but "living corporeal substances" with "both mental and physical characteristics" (3).If Phemister is right, one wonders what to make of Leibniz's many endorsements of idealism, as, for instance, when he says that "the explanation of all phenomena solely through the perception of monads... with corporeal substances to be rejected, [is] useful for a fundamental investigation of things" (Leibniz to Bartholomew Des Bosses, June [End Page 162] 16, 1712). This programmatic summary is only one of numerous statements from the late period where Leibniz asserts that ultimate reality is composed of immaterial monads. One possible option would be to posit an indecisive vacillation in Leibniz's late philosophy. Rejecting this, Phemister's strategy for dealing with texts such as these—including the "New System," the "Principles of Nature and Grace," and the "Monadology"—is to dismiss them as the rhetorical subterfuge of a Leibniz who is only exoterically, not privately, a Cartesian (15, 163). Leibniz is a public Cartesian in that he "invites comparison of his rational monads with Cartesian minds" by suggesting that the former, like Cartesian minds, are immaterial and incorporeal (13). This is ostensibly only a ruse Leibniz used to ingratiate himself to a Cartesian audience, hiding from them his real view that genuine substances are always corporeal. We are not told why Leibniz would have expected an idealist philosophy that explains mind-body interaction in terms of a pre-established harmony to be well received by Cartesians, but with this hermeneutical principle in hand, Phemister has deftly insulated her criticism from textual refutation.A more pressing concern is Phemister's principle thesis that "the monad is a corporeal substance" (73). Phemister argues that monads are not complete substances unless they comprise not only a soul-like entelechy, but also primary and secondary matter: a monad is not substantially complete "without the subordinate monads that comprise its organic body" (41). What is important to note in this account is that for monads to be complete substances, they must consist of both a "soul-like aspect" and secondary matter, an organic body (133). This organic body is itself an aggregate of other corporeal substances, which are themselves combinations of entelechies and primary and secondary matter (81). The clear consequence of this is that the monad's existence as a complete substance is dependent upon the existence of other substances, namely, those substances that aggregate to form its organic body, the secondary matter that completes the monad as substance. Hence, the existence of complete substances—the only genuine substances—is ontologically derivative. This conclusion flatly contradicts Leibniz's repeated assertions that substances are ontologically basic, not depending for their existence on the existence of other substances, the very cornerstone of Leibniz's metaphysics.This account is also beset by a vicious circularity. For there to be complete substances, there must first be secondary matter, as secondary matter is a constituent of complete substances. As Phemister puts it, "both primary and secondary matter complete the dominant entelechy," making it a genuine substance (71). Without secondary matter, the dominant entelechy does not exist as a substance. But the existence of secondary matter is itself dependent upon the existence of complete substances, for secondary matter just is an aggregate of corporeal substances (84...