The papers in this volume address fundamental, and interrelated, philosophical issues concerning modality and identity, issues that have not only been pivotal to the development of analytic philosophy in the twentieth century, but remain a key focus of metaphysical debate in the twenty-first. How are we to understand the concepts of necessity and possibility? Is chance a basic ingredient of reality? How are we to make sense of claims about personal identity? Do numbers require distinctive identity criteria? Does the capacity to identify an object presuppose an ability to bring it under a sortal concept? Rather than presenting a single, partisan perspective, Identity and Modality enriches our understanding of identity and modality by bringing together papers written by leading researchers working in metaphysics, the philosophy of mind, the philosophy of science, and the philosophy of mathematics. The resulting variety of perspectives correspondingly reflects both the breadth and depth of contemporary theorizing about identity and modality, each paper addressing a particular issue and advancing our knowledge of the area. This volume will provide essential reading for graduate students in the subject and professional philosophers.

David Lewis (1941-2001) was a celebrated and influential figure in analytic philosophy. When Lewis died, he left behind a large body of unpublished notes, manuscripts, and letters. This volume contains two longer manuscripts which Lewis had originally intended to turn into books, and thirty-one shorter items. The longer manuscripts are 'The Paradoxes of Time Travel', his David Gavin Young Lectures at the University of Adelaide, and 'Confirmation Theory', which is based on a graduate course on probability and logic that he gave at UCLA. Lewis's described his purposes in 'The Paradoxes of Time Travel' as being, `(1) to solve a philosophical problem hitherto largely ignored or casually mis-solved by philosophers […]; (2) to introduce the layman to various topics in metaphysics, since our problem turns out to connect with many more familiar ones; and (3) to show of several of my favorite doctrines and methods in metaphysics'. By contrast, 'Confirmation Theory' is a technical work in which Lewis aimed to present in a unified fashion what he considered to be the best from competing theories of confirmation. Lewis described the work as 'Mathematically self-contained, with proofs for the major theorems; but the mathematics is kept down to hairy high-school algebra'. The thirty-one shorter items cover such topics as causation, freedom of the will, probability, counterparts, reference, logic, value, and divine evil. They are included here both for their intrinsic philosophical interest and their historical value. This volume also contains an intellectual biography of the young David Lewis by the editors.

The concepts of particular and universal have become so familiar that their significance has become difficult to discern, like coins that have been passed back and forth too many times, worn smooth so their values can no longer be read. On the Genealogy of Universals seeks to overcome our sense of over-familiarity with these concepts by providing a case study of their evolution during the late 19th century and early 20th century, a study that shows how the history of these concepts is bound up with the origins and development of analytic philosophy itself. Understanding how these concepts were taken up, transfigured and given up by the early analytic philosophers, enables us to recover and reanimate the debate amongst them that otherwise remains Delphic - to interpret some of the early, originating texts of analytic philosophy that have hitherto baffled commentators, including Moore's early papers, to appreciate afresh the neglected contributions of philosophical figures that historians of analytic philosophy have mostly since forgot, including Stout and Whitehead, and to shed new light upon the relationships of Moore to Russell and Russell to Wittgenstein.