Substance and Essence in Aristotle is a close study of Aristotle's most profound—and perplexing—treatise: Books VII-IX of the Metaphysics. These central books, which focus on the nature of substance, have gained a deserved reputation for their difficulty, inconclusiveness, and internal inconsistency. Despite these problems, Witt extracts from Aristotle's text a coherent and provocative view about sensible substance by focusing on Aristotle's account of form or essence. After exploring the context in which Aristotle's discussion of sensible substance takes place, Witt turns to his analysis of essence. Arguing against the received interpretation, according to which essences are classificatory, Witt maintains that a substance's essence is what causes it to exist. In addition, Substance and Essence in Aristotle challenges the orthodox view that Aristotelian essences are species-essences, defending instead the controversial position that they are individual essences. Finally, Witt compares Aristotelian essentialism to contemporary essentialist theories, focusing in particular on Kripke's work. She concludes that fundamental differences between Aristotelian and contemporary essentialist theories highlight important features of Aristotle's theory and the philosophical problems and milieu that engendered it.

Paul Ricoeur (1913-2005) was one of the outstanding French philosophers of the 20th century and his work is widely read in the English-speaking world. This unique volume comprises the lectures that Ricoeur gave on Plato and Aristotle at the University of Strasbourg in 1953-54. The aim of these lectures is to analyse the metaphysics of Plato and Aristotle and to discern in their work the ontological foundations of Western philosophy. The relation between Plato and Aristotle is commonly portrayed as a contrast between a philosophy of essence and a philosophy of substance, but Ricoeur shows that this opposition is too simple. Aristotelian ontology is not a simple antithesis to Platonism: the radical ontology of Aristotle stands in a far more subtle relation of continuity and opposition to that of Plato and it is this relation we have to reconstruct and understand. Ricoeur’s lectures offer a brilliant analysis of the great works of Plato and Aristotle which has withstood the test of time. They also provide a unique insight into the development of Ricoeur’s thinking in the early 1950s, revealing that, even at this early stage of his work, Ricoeur was focused sharply on issues of language and the text.

Aristotle's views on the fundamental nature of reality are usually taken to be inconsistent. Two sources for these views are Categories and the central books of Metaphysics. This text argues that he is engaged in different projects in these books.

In this book, Theodore Scaltsas brings the insights of contemporary philosophy to bear on a classic problem in metaphysics that stems from Aristotle's theory of substance. Scaltsas provides an analysis of the enigmatic notions of potentiality and actuality, which he uses to explain Aristotle's substantial holism by showing how the concrete and the abstract parts of a substance form a dynamic, diachronic whole.

Charlotte Witt continues her highly regarded exploration of Aristotle's metaphysics in a book devoted to the ontological distinction between potentiality and actuality. She focuses on Metaphysics book ix, which provides the most sustained discussion of this distinction. Witt rejects the conventional reading of this key text—that Aristotle differentiated between the two concepts solely to further the investigation of substance. Instead, in an original interpretation of his work, she argues that his development of the distinction between "being x potentially" and "being x actually" allowed Aristotle to develop an intrinsically hierarchical and normative vision of reality.For Witt, Aristotle's views about being shed light on his puzzling use of gender language in his descriptions of reality. This language has become an important issue for feminist scholars who have noted that in Aristotle's metaphysics of substance form is sometimes associated with the male, and matter with the female. Witt's interpretation that Aristotelian reality is intrinsically hierarchical and normative, but not intrinsically gendered, offers a new, important understanding of a controversial aspect of Aristotle's metaphysics.

In Aquinas on Being and Essence: A Translation and Interpretation, Joseph Bobik interprets the doctrines put forth by St. Thomas Aquinas in his treatise On Being and Essence. He foregrounds the meaning of the important distinction between first and second intentions, the differing uses of the term “matter,” and the Thomistic conception of metaphysics.

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.