Neoplatonists from Plotinus onward incorporate Aristotle’s logic and ontology into their philosophies: this process is of both intrinsic and historical interest and paves the way for subsequent philosophical debates in the Middle Ages and beyond. The ten essays collected in this book focus on the readings of Aristotle by Plotinus, Porphyry, and Iamblichus in the 3rd and 4th centuries. Their discussions cover key issues in the history of logic and metaphysics such as substance, hylomorphism, causation, existence, and predication. Among the topics tackled in this volume are Plotinus’ criticism of Aristotle’s physical essentialism, which is a major chapter in the history of metaphysics, and the interpretation of Porphyry’s Isagoge, one of the most influential and enigmatic works in the history of philosophy. Further essays focus on the readings of Aristotle’s categories developed by Porphyry and Iamblichus, which raise interesting questions at the intersection of logic and ontology, and on the integration of Aristotle’s ontology into Neoplatonist accounts of being and existence.

Forms, Souls, and Embryos allows readers coming from different backgrounds to appreciate the depth and originality with which the Neoplatonists engaged with and responded to a number of philosophical questions central to human reproduction, including: What is the causal explanation of the embryo’s formation? How and to what extent are Platonic Forms involved? In what sense is a fetus ‘alive,’ and when does it become a human being? Where does the embryo’s soul come from, and how is it connected to its body? This is the first full-length study in English of this fascinating subject, and is a must-read for anyone interested in Neoplatonism or the history of medicine and embryology.

This volume dispels the idea that Platonism was an otherworldly enterprise which neglected the study of the natural world. Leading scholars examine how the Platonists of late antiquity sought to understand and explain natural phenomena: their essays offer a new understanding of the metaphysics of Platonism, and its place in the history of science.

A groundbreaking approach to late Byzantine intellectual history and the philosophy of visionary reformer Gemistos Plethon.

Neoplatonic Demons and Angels is a collection of eleven studies which examine, in chronological order, the place reserved for angels and demons not only by the main Neoplatonic philosophers (Plotinus, Porphyry, Iamblichus, and Proclus), but also in Gnosticism, the Chaldaean Oracles, Christian Neoplatonism, especially by Pseudo-Dionysius the Areopagite. This volume originates from a panel held at the 2014 ISNS meeting in Lisbon, but is supplemented by a number of invited papers.

This book argues that Western philosophy's traditional understanding of Being as substance is incorrect, and demonstrates that Being is fundamentally Relationality. To make that argument, the book examines the history of Western philosophy's evolving conception of being, and shows how this tradition has been dominated by an Aristotelian understanding of substance and his corresponding understanding of relation. First, the book establishes that the original concept of Being in ancient Western philosophy was relational, and traces this relational understanding of Being through the Neoplatonists. Then, it follows the substantial understanding of Being through Aristotle and the Scholastics to reach its crisis in Descartes. Finally, the book demonstrates that Heidegger represents a recovery of the original, relational understanding of Being.

In 2021, a previously unknown treatise by Porphyry of Tyre, which has been preserved in a Syriac translation, was made available to historians of philosophy: Porphyry, On Principles and Matter (De Gruyter, 2021). This text not only enlarges our knowledge of the legacy of the most prominent disciple of Plotinus but also serves as an important witness to Platonist discussions of first principles and of Plato’s concept of prime matter in the Timaeus. The aim of the present volume of collected studies is two-fold. On the one hand, it brings up an update to the state of the art of our knowledge of Porphyry’s philosophy and of his role in the transmission of the earlier philosophical materials, especially those of the Middle Platonic works. On the other hand, it focuses on the questions of the reception of Porphyry’s legacy, both by Greek and Latin Platonists (with special interest in Calcidius) and by Christian Oriental authors (with particular focus on the Syriac tradition). The primary audience of the book will be scholars and graduate students in ancient and late ancient Greek philosophy, Orientalists and scholars interested in the Christian reception of Greek philosophy, in the studies of the Christian Orient, as well as in Greek, Latin, and Syriac philology.

Essences have been assigned important but controversial explanatory roles in philosophical, scientific, and social theorizing. Is it possible for the same organism to be first a caterpillar and then a butterfly? Is it impossible for a human being to transform into an insect like Gregor Samsa does in Kafka’s The Metamorphosis? Is it impossible for Lot’s wife to survive being turned into a pillar of salt? Traditionally, essences (or natures) have been thought to help answer such central questions about existence, identity, persistence, and modality. These questions are not only of great philosophical interest, they also are of great interest to society at large. This Handbook surveys the state of the art on essence. Core issues about essence are discussed in 33 chapters, all of them written exclusively for this volume by leading experts. They are organized into the following four major parts, each with its own introduction that provides a summary and comparison of the part’s chapters: History Essence and Essentialisms: Themes and Variations Applications Anti-Essentialist Challenges. The volume is accessible enough for students while also providing enough details to make it a valuable reference for researchers. While the notion of essence has been targeted for sustained criticisms since antiquity, recent work has renewed interest in the topic. This Handbook explains and synthesizes much of this current interest, placing essence within its historical context and drawing connections to many contemporary areas of philosophy as well as to scholarly work in other disciplines. With cross-references in each chapter and a comprehensive index, The Routledge Handbook of Essence in Philosophy is a useful resource and essential reading for anyone, whether in or out of academic philosophy, seeking clarification on one of philosophy’s most distinctive and notorious notions.

Metaphysics or Ontology? treats the evolution of the object of metaphysics from being, to the concept of being, to, finally, the object (thought). Possible being must be non-contradictory, but an object of thought includes anything a human being can think, including contradictions and nothingness. When the concept of being, or object of thought, replaces existence as the object of metaphysics, it becomes something other than metaphysics—ontology, or something beyond ontology. However, ontology cannot examine existence because it only investigates concepts and possibility. Only classical metaphysics investigates reality qua reality. This book masterfully treats the history of this controversy and many other important metaphysical questions raised over the centuries