Oxford Studies in Metaphysics is the forum for the best new work in this flourishing field. Much of the most interesting work in philosophy today is metaphysical in character: this new series is a much-needed focus for it. OSM offers a broad view of the subject, featuring not only the traditionally central topics such as existence, identity, modality, time, and causation, but also the rich clusters of metaphysical questions in neighbouring fields, such as philosophy of mind and philosophy of science. Besides independent essays, volumes will often contain a critical essay on a recent book, or a symposium that allows participants to respond to one another's criticisms and questions. A special feature of this volume is an unpublished paper on nominalism by W. V. Quine, arguably the most influential figure in philosophy in the second half of the twentieth century. It is accompanied by five specially commissioned commentaries. Topics discussed by other papers in this volume include ontology, location, truthmaking, and physicalism. Anyone who wants to know what's happening in metaphysics can start here.