The Principle of Sufficient Reason is a powerful and controversial philosophical principle stipulating that everything must have a reason or cause. This simple demand for thoroughgoing intelligibility yields some of the boldest and most challenging theses in the history of metaphysics and epistemology. In this entry we begin with explaining the Principle, and then turn to the history of the debates around it. A section on recent discussions of the Principle will be added in the near future.

This paper offers a defense of a much-maligned Leibnizian argument for the Principle of Sufficient Reason, the principle according to which whatever is has a sufficient reason or explanation. While Leibniz’s argument is widely thought to rely on a question-begging premise, the paper offers a wholly original and non-question-begging defense of that premise, a defense that Leibniz did not anticipate. The paper does not present this defense of Leibniz's argument as an interpretation of Leibniz; rather, the paper—more modestly in one (...) way, less modestly in another—simply claims that this argument succeeds. (shrink)

I examine several alleged grounds of the principle of sufficient reason in Leibniz’s philosophy. These include the nature of a requisite and a sufficient condition, the nature of truth, and the nature of harmony. I argue that Leibniz does not ground the PSR in any of these ways. Instead, he is committed to a value-based grounds of the PSR: God creates the best possible world, and the fact that the PSR obtains in this world contributes to it being the best. (...) I conclude by considering some objections to this way of grounding the PSR. (shrink)

I argue that Émilie Du Châtelet breaks with Christian Wolff regarding the scope and epistemological content of the principle of sufficient reason, despite his influence on her basic ontology and their agreement that the principle of sufficient reason has foundational importance. These differences have decisive consequences for the ways in which Du Châtelet and Wolff conceive of science.

Leibniz often refers to the Principle of Sufficient Reason (PSR) as something like a first principle. In some texts, however, he attempts to give positive arguments in its favor. I examine two such arguments, and find them wanting. The first argument has two defects. First, it is question-begging; and second, when the question-begging step is excised, the principle one can in fact derive is highly counter-intuitive. The second argument is valid, but has the defect of only reaching a nearly trivial (...) conclusion. (shrink)

This paper critically examines a prominent and perennial strategy—found in thinkers as diverse as Kant and Shamik Dasgupta—of simultaneously embracing the Principle of Sufficient Reason and also limiting it so as to avoid certain apparently negative consequences of an unrestricted PSR. I will argue that this strategy of taming the PSR faces significant challenges and may even be incoherent. And for my purposes, I will enlist a generally derided argument by Leibniz for the PSR which will help us to see (...) the connections between the PSR and a radical form of monism. (shrink)

The aim of this paper is to shed light on Leibniz’s justification of the Principle of Sufficient Reason. It approaches this issue through a close textual analysis of the correspondence with Samuel Clarke and a more abstruse and lesser-known writing, ‘Leibniz’s Philosophical Dream’.

The mind-body problem in philosophy is typically understood as a discourse concerning the relation of mental states to physical states, and the experience of sensation. On this level it seems to transcend issues of race and racism, but Another Mind-Body Problem demonstrates that racial distinctions have been an integral part of the discourse since the Modern period in philosophy. Reading figures such as Descartes, Leibniz, and Kant in their historical contexts, John Harfouch uncovers discussions of mind and body that engaged (...) closely with philosophical and scientific notions of race in metaphysics and the philosophy of mind, in particular in understanding how the mind unites with the body at birth and is then passed on through sexual reproduction. Kant argued that a person’s exterior body and interior psyche are bound together, that non-White people lacked reason, and that this lack of reason was carried on through reproduction such that non-Whites were an example of a union of mind and body without full being. Charting the development of this phenomenon from sixteenth-century medical literature to modern-day race discourse, Harfouch argues for new understandings of Descartes’s mind-body problem, Fanon’s experience of being ‘not-yet human,’ and the place of racism in relation to one of philosophy’s most enduring and canonical problems. -/- “Harfouch has written an important book on the intersection of race and the Western construction of the mind-body problem … This book is a significant resource for theorists dealing with race and decolonization issues, but it is more significant for the critique of philosophy itself and the continued teaching of mind-body issues. Readers will need some knowledge of philosophy, but the volume is in general accessible. It should be required reading for scholars of philosophy. Harfouch establishes a logically strong argument and makes a unique contribution to the field.” — CHOICE. (shrink)