This volume collects the most important articles on the metaphysics of modality by philosopher Alvin Plantinga. The focus is on such fundamental issues in metaphysics as the nature of abstract objects.

This book gathers together thirteen of Peter van Inwagen's essays on metaphysics, several of which have acquired the status of modern classics in their field. They range widely across such topics as Quine's philosophy of quantification, the ontology of fiction, the part-whole relation, the theory of 'temporal parts', and human knowledge of modal truths. In addition, van Inwagen considers the question as to whether the psychological continuity theory of personal identity is compatible with materialism, and defends the thesis that possible states of affairs are abstract objects, in opposition to David Lewis's 'extreme modal realism'. A specially-written introduction completes the collection, which will be an invaluable resource for anyone interested in metaphysics.

This volume collects the most important articles on the metaphysics of modality by philosopher Alvin Plantinga. The focus is on such fundamental issues in metaphysics as the nature of abstract objects.

Drawing together his work from four decades, Phillip Bricker provides a comprehensive account of modal reality - the realm of possible worlds - from a Humean perspective, with excursions into neighboring topics in metaphysics. Many of the chapters in this volume focus on aspects of David Lewis's metaphysics and his defence of modal realism, sometimes further developing and defending Lewis's views, sometimes deviating from them in substantial ways. The volume is presented in four parts: part one sketches an account of reality as a whole, both the mathematical and the modal, defending a form of plenitudinous realism; part two presents and defends a realist theory of concrete possible worlds with an absolute ontological distinction between the actual and the merely possible; part three presents and defends a Humean account of modal plenitude, formulating and endorsing principles that guarantee a plenitude of recombination, of possible structures, and of alien contents; and part four applies the Humean account to truthmaking, mereology, spacetime, and quantities. An uncompromising Humean, Bricker shows that holding fast to Humean strictures leads to views that differ in radical ways from those prevalent among contemporary metaphysicians.

Timothy Williamson is one of the most influential living philosophers working in the areas of logic and metaphysics. His work in these areas has been particularly influential in shaping debates about metaphysical modality, which is the topic of his recent provocative and closely-argued book Modal Logic as Metaphysics (2013). This book comprises ten essays by metaphysicians and logicians responding to Williamson’s work on metaphysical modality, as well as replies by Williamson to each essay. In addition, it contains an original essay by Williamson, ‘Modal science,’ concerning the role of modal claims in natural science. This book was originally published as a special issue of the Canadian Journal of Philosophy.

The Actual and the Possible presents new essays by leading specialists on modality and the metaphysics of modality in the history of modern philosophy from the seventeenth to the twentieth centuries. It revisits key moments in the history of modern modal doctrines, and illuminates lesser-known moments of that history. The ultimate purpose of this historical approach is to contextualise and even to offer some alternatives to dominant positions within the contemporary philosophy of modality. Hence the volume contains not only new scholarship on the early-modern doctrines of Baruch Spinoza, G. W. F. Leibniz, Christian Wolff and Immanuel Kant, but also work relating to less familiar nineteenth-century thinkers such as Alexius Meinong and Jan Lukasiewicz, together with essays on celebrated nineteenth- and twentieth-century thinkers such as G. W. F. Hegel, Martin Heidegger and Bertrand Russell, whose modal doctrines have not previously garnered the attention they deserve. The volume thus covers a variety of traditions, and its historical range extends to the end of the twentieth century, addressing the legacy of W. V. Quine's critique of modality within recent analytic philosophy.

The philosophy of modality investigates necessity and possibility, and related notions—are they objective features of mind-independent reality? If so, are they irreducible, or can modal facts be explained in other terms? This volume presents new work on modality by established leaders in the field and by up-and-coming philosophers. Between them, the papers address fundamental questions concerning realism and anti-realism about modality, the nature and basis of facts about what is possible and what is necessary, the nature of modal knowledge, modal logic and its relations to necessary existence and to counterfactual reasoning. The general introduction locates the individual contributions in the wider context of the contemporary discussion of the metaphysics and epistemology of modality.