In William Ockham on Metaphysics, Jenny Pelletier offers an account of Ockham's concept of metaphysics as it emerges throughout his philosophical and theological work. She argues that Ockham (c. 1287-1347) believed metaphysics to be a fruitful branch of philosophy and gives a preliminary description of its distinctive subject-matter. Metaphysics is the science that studies all beings and their most general properties. Ockham was considered by some to be profoundly skeptical of metaphysics. Recent scholarship tends to focus on regional metaphysical issues (e.g. universals, relations), logic or semantics, theory of cognition, concepts, mental language. Jenny Pelletier provides a positive interpretation of Ockham on metaphysics as such that enriches our current understanding of this seminal medieval thinker.

Since antiquity, philosophers have investigated how change works. If a thing moves from one state to another, when exactly does it start to be in its new state, and when does it cease to be in its former one? In the late Middle Ages, the "problem of the instant of change” was subject to considerable debate and gave rise to sophisticated theories; it became popular and controversial again in the second half of the twentieth century. The studies collected here constitute the first attempt at tackling the different aspects of an issue that, until now, have been the object of seminal but isolated forays. They do so in through a historical perspective, offering both the medieval and the contemporary viewpoints. Contributors are Damiano Costa, Graziana Ciola, William O. Duba, Simo Knuuttila, Greg Littmann, Can Laurens Löwe, Graham Priest, Magali Roques, Niko Strobach, Edith Dudley Sylla, Cecilia Trifogli and Gustavo Fernández Walker.

This text contains detailed discussion and analysis of Dun Scotus's accounts of the nature of matter and the structure of material substance. His views on these matters are sophisticated and highly original.

A collection of the influential ethical writings of medieval philosopher William of Ockham, published in English for the first time.