This volume presents fourteen new essays by leading figures in the fields of ancient philosophy and contemporary metaphysics, discussing Aristotle's theory of the unity of substances. This topic remains at the centre of metaphysical enquiry.The contributors examine the nature of essences, how they differ from other components of substance, and how they are related to these other components. The central questions discussed here are: What does Aristotle mean by 'potentiality' and 'actuality'? How do these concepts explicate matter andform, and how are they related to the actuality of substance? What is the role of matter and form in accounting for the unity, identity, and individuation of substances? These questions are crucial to an understanding of the unity of composite substances and their identity over time.The aim of the volume is both exegetical and philosophical: to address central issues in Aristotle's Metaphysics, and to stimulate further investigation of the problems and controversies that arise from these.

This book explores a fundamental tension in Aristotle's metaphysics: how can an entity such as a living organisma composite generated through the imposition of form on preexisting matterhave the conceptual unity that Aristotle demands of primary substances? Mary Louise Gill bases her treatment of the problem of unity, and of Aristotle's solution, on a fresh interpretation of the relation between matter and form. Challenging the traditional understanding of Aristotelian matter, she argues that material substances are subverted by matter and maintained by form that controls the matter to serve a positive end. The unity of material substances thus involves a dynamic relation between resistant materials and directive ends. Aristotle on Substance offers both a general account of matter, form, and substantial unity and a specific assessment of particular Aristotelian arguments. At every point, Gill engages Aristotle on his own philosophical ground through the detailed analysis of central, and often controversial, texts from the Metaphysics, Physics, On Generation and Corruption, De Anima, De Caelo, and the biological works. The result is a coherent, firmly grounded rethinking of Aristotle's central metaphysical concepts and of his struggle toward a fully consistent theory of material substances.

Aristotle maintains that biological organisms are compounds of matter and form and that compounds that have the same form are individuated by their matter. According to Aristotle, an object that undergoes change is an object that undergoes a change in form, i.e. form is imposed upon something material in nature. Aristotle therefore identifies organisms according to their matter and essential forms, forms that are arguably essential to an object's existence. Jeremy Kirby addresses a difficulty in Aristotle's metaphysics, namely the possibility that two organisms of the same species might share the same matter. If they share the same form, as Aristotle seems to suggest, then they seem to share that which they cannot, their identity. By taking into account Aristotle's views on the soul, its relation to living matter, and his rejection of the possibility of resurrection, Kirby reconstructs an answer to this problem and shows how Aristotle relies on some of the central themes in his system in order to resist this unwelcome result that his metaphysics might suggest.

Focusing on the medieval reception of Book Zeta of Aristotle’s Metaphysics, Volume One of this work offers an unprecedented and philosophically oriented study of medieval ontology against the background of the current metaphysical debate on the nature of material objects. Volume Two makes available to scholars one of the culminating points in the medieval reception of Aristotle’s metaphysical thought by presenting the first critical edition of Book VII of Paul of Venice’s Commentary on Aristotle’s Metaphysics (1420-1424).”

Reale's monumental work establishes the exact dimensions of Aristotle's concept of first philosophy and proves the profound unity of concept that exists in Aristotle's Metaphysics. Reale's opposition to the genetic interpretation of the Metaphysics is an updated return to a more traditional view of Aristotle's work, one which runs counter to nearly all contemporary scholarship. Reale argues that Aristotle's first philosophy includes a study of being, a study of substance, a study of divine substance, and a study of principles and causes, all of which are integrated and dialectically reconciled.

The Oxford Handbook of Aristotle reflects the lively international character of Aristotelian studies, drawing contributors from the United Kingdom, the United States, Germany, France, Switzerland, Italy, Canada, and Japan; it also, appropriately, includes a preponderance of authors from the University of Oxford, which has been a center of Aristotelian studies for many centuries. The volume equally reflects the broad range of activity Aristotelian studies comprise today: such activity ranges from the primarily textual and philological to the application of broadly Aristotelian themes to contemporary problems irrespective of their narrow textual fidelity. In between these extremes one finds the core of Aristotelian scholarship as it is practiced today, and as it is primarily represented in this Handbook: textual exegesis and criticism. Even within this more limited core activity, one witnesses a rich range of pursuits, with some scholars seeking primarily to understand Aristotle in his own philosophical milieu and others seeking rather to place him into direct conversation with contemporary philosophers and their present-day concerns. No one of these enterprises exhausts the field. On the contrary, one of the most welcome and enlivening features of the contemporary Aristotelian scene is precisely the cross-fertilization these mutually beneficial and complementary activities offer one another. The volume, prefaced with an introduction to Aristotle's life and works by the editor, covers the main areas of Aristotelian philosophy and intellectual enquiry: ethics, metaphysics, politics, logic, language, psychology, rhetoric, poetics, theology, physical and biological investigation, and philosophical method. It also, and distinctively, looks both backwards and forwards: two chapters recount Aristotle's treatment of earlier philosophers, who proved formative to his own orientations and methods, and another three chapters chart the long afterlife of Aristotle's philosophy, in Late Antiquity, in the Islamic World, and in the Latin West.

This is a study of the union of matter and the soul in the human being in the thought of the Dominican Thomas Aquinas. At first glance this issue might appear arcane, but it was at the centre of polemic with heresy in the thirteenth century and at the centre of the development of medieval thought more broadly. The book argues that theological issues, especially the need for an identical body to be resurrected at the end of time, but also considerations about Christ's crucifixion and saints' relics, were central to Aquinas's account of how human beings are constituted. The book explores in particular how theological questions and concerns shaped Aquinas's thought on individuality and personal and bodily identity over time, his embryology and understanding of heredity, his work on nutrition and bodily growth, and his fundamental conception of matter itself. It demonstrates, up-close, how Aquinas used his peripatetic sources, Aristotle and (especially) Averroes, to frame and further his own thinking in these areas. The book also indicates how Aquinas's thought on bodily identity became pivotal to university debates and relations between the rival mendicant orders in the late thirteenth and early fourteenth centuries, and that quarrels surrounding these issues persisted into the fifteenth century. Not only is this a study of the interface between theology, biology, and physics in Aquinas's mind; it also fundamentally revises the view of Aquinas that is generally accepted. Aquinas is famous for holding that the one and only substantial (or nature-determining) form in a human being is the soul, and most scholars have therefore thought that he located the identity of the individual in their soul. This book restores the body through a thorough and critical examination of the range of Aquinas's works.