Journal of the History of Philosophy

During the twentieth century, scholars of Leibniz have mostly ignored his theology. The tide has recently turned, however, and a few brave souls have begun to disentangle the subtle complications of the relations between Leibniz’s philosophical theology and the rest of his thought. Donald Rutherford is such a brave soul. In his book, he intends to recover “the theodicy as an essential part of Leibniz’s philosophy” (1). To this end, he offers “a comprehensive interpretation of Leibniz’s metaphysical theories—particularly those of his late writings,” and attempts to show “how theodicy [End Page 139] and metaphysics inform each other in his thought” (1). The book has three parts and ten chapters. In the three chapters of Part I, Rutherford “focuses on Leibniz’s theodicy: his vindication of divine justice, the character of the goods that make this the best of all possible worlds, and the special role assigned to rational minds as agents within God’s providential plan for the world” (1). In the three chapters of Part II, Rutherford turns his attention to “Leibniz’s conception of metaphysics as a rational science” and to the notion of substance at its center (2). Finally, in the four chapters of Part III, Rutherford presents an account of Leibniz’s late metaphysics.

The structure of Rutherford’s general argument is ingenious. Most fundamentally, he argues that “the guiding force behind” the theodicy is a commitment to reason: “reason as it directs the creative will of God, reason as it is .. . realized in the intelligible order of the created world, and reason as it helps human beings discern and appreciate that order.” Moreover, “Leibniz’s metaphysical theories are designed to promote the goals of his theodicy” by evidencing as much as possible that rational order (2). Therefore, once we see the metaphysics in light of its theological goal, the close interconnections among its parts will become evident. As Rutherford nicely puts it: “The Leibniz who emerges in this book is one for whom theoretical and practical ends are inextricably linked” (3).

In Part I, Rutherford describes the project of the theodicy and, along the way, offers answers to questions which have plagued scholars for decades: What is the relation between variety and simplicity as (apparently conflicting) criteria of worldly goodness? How is the demand for the maximization of perfection related to the (apparently conflicting) commitment to the optimization of the happiness of rational creatures? How can there be different orders and harmonies in one world? Although many of Rutherford’s proposals are both plausible and interesting, they are painted with such broad strokes that they are sometimes difficult to evaluate. Some of the missing details are supplied later in the book, but others are not. For example, a clear picture of the relation between God’s power, goodness, will, and rationality never emerges. In Part II, Rutherford surveys some important texts and topics which concern Leibniz’s methodology, and he presents an intelligent interpretation of Leibniz’s theory of substance. There is much that is interesting here. In Part III, Rutherford is at his best. He ties together many of the separate strands of the late philosophy and tells a plausible story about monads, panorganism, and corporeal substance. This is a genuine achievement and one that will generate a lot of discussion.

While I applaud Rutherford’s attempt to construct a coherent account of Leibniz’s philosophy, it is my opinion that he has attached too much importance both to the rational order that is supposed to please the faculty of reason, whether divine or human, and to that faculty itself. According to the Christianized Platonism that Leibniz learned (among many other things) from his teachers in Leipzig, it is the intellect or understanding (intellectus) and not the reason that comes to know the most fundamental truths; and moreover the goodness that created beings (and their interrelations) are supposed to have is based on the fact that they are expressions of God...