The word “metaphysics” conjures up thoughts of very hard questions about reality and deep, perhaps unresolvable, metaphysical mysteries. But is that the right way to think about the subject matter of metaphysics? According to Amie Thomasson, very clearly no. In her new book, Rethinking Metaphysics (Oxford University Press, 2025), Thomasson argues that traditional views of metaphysics make the mistake of assuming that our concepts all function the same way – for example, that the job of metaphysics is to provide truthmakers for statements about necessity and possibility, about morality, about numbers, when each of these discourses have different aims. Thomasson, who is Daniel P. Stone Professor of Intellectual and Moral Philosophy at Dartmouth College, instead offers a deflationary view of metaphysics in which the job of metaphysicians is conceptual engineering – of figuring out how our concepts and terms work in a discourse, what their various functions are, and what conceptual schemes we should adopt, particularly if our current ones are leading us into metaphysical pseudo-problems.

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