The first comprehensive study of the function and value of aporia, or puzzlement, as a key tool in ancient philosophical enquiry.

In this book, Vasilis Politis argues that Plato's Forms are essences, not merely things that have an essence. Politis shows that understanding Plato's theory of Forms as a theory of essence presents a serious challenge to contemporary philosophers who regard essentialism as little more than an optional item on the philosophical menu. This approach, he suggests, also constitutes a sharp critique of those who view Aristotelian essentialism as the only sensible position: Plato's essentialism, Politis demonstrates, is a well-argued, rigorous, and coherent theory, and a viable competitor to that of Aristotle. This book will appeal to students and scholars with an interest in the intersection between philosophy and the history of philosophy.

The Cambridge History of Philosophy in Late Antiquity comprises over forty specially commissioned essays by experts on the philosophy of the period 200–800 CE. Designed as a successor to The Cambridge History of Later Greek and Early Medieval Philosophy (edited by A. H. Armstrong), it takes into account some forty years of scholarship since the publication of that volume. The contributors examine philosophy as it entered literature, science and religion, and offer new and extensive assessments of philosophers who until recently have been mostly ignored. The volume also includes a complete digest of all philosophical works known to have been written during this period. It will be an invaluable resource for all those interested in this rich and still emerging field.

This new edition introduces the reader to the philosophy of early Christianity in the second to fourth centuries AD, and contextualizes the philosophical contributions of early Christians in the framework of the ancient philosophical debates. It examines the first attempts of Christian thinkers to engage with issues such as questions of cosmogony and first principles, freedom of choice, concept formation, and the body–soul relation, as well as later questions like the status of the divine persons of the Trinity. It also aims to show that the philosophy of early Christianity is part of ancient philosophy as a distinct school of thought, being in constant dialogue with the ancient philosophical schools, such as Platonism, Aristotelianism, Stoicism, and even Epicureanism and Scepticism. This book examines in detail the philosophical views of Christian thinkers such as Justin Martyr, Clement of Alexandria, Irenaeus, Tertullian, Origen, Basil, and Gregory of Nyssa, and sheds light in the distinct ways they conceptualized traditional philosophical issues and made some intriguing contributions. The book’s core chapters survey the central philosophical concerns of the early Christian thinkers and examines their contributions. These range across natural philosophy, metaphysics, logic and epistemology, psychology, and ethics, and include such questions as how the world came into being, how God relates to the world, the status of matter, how we can gain knowledge, in what sense humans have freedom of choice, what the nature of soul is and how it relates to the body, and how we can attain happiness and salvation. This revised edition takes into account the recent developments in the area of later ancient philosophy, especially in the philosophy of Early Christianity, and integrates them in the relevant chapters, some of which are now heavily expanded. The Philosophy of Early Christianity remains a crucial introduction to the subject for undergraduate and postgraduate students of ancient philosophy and early Christianity, across the disciplines of classics, history, and theology.

In this book, Vasilis Politis argues that Plato's Forms are essences, not merely things that have an essence. Politis shows that understanding Plato's theory of Forms as a theory of essence presents a serious challenge to contemporary philosophers who regard essentialism as little more than an optional item on the philosophical menu. This approach, he suggests, also constitutes a sharp critique of those who view Aristotelian essentialism as the only sensible position: Plato's essentialism, Politis demonstrates, is a well-argued, rigorous, and coherent theory, and a viable competitor to that of Aristotle. This book will appeal to students and scholars with an interest in the intersection between philosophy and the history of philosophy.

De mundo is a protreptic to philosophy in the form of a letter to Alexander the Great and is traditionally ascribed to Aristotle. It offers a unique view of the cosmos, God and their relationship, which was inspired by Aristotle but written by a later author. The author provides an outline of cosmology, geography and meteorology, only to argue that a full understanding of the cosmos cannot be achieved without a proper grasp of God as its ultimate cause. To ensure such a grasp, the author provides a series of twelve carefully chosen interlocking analogies, building a complex picture in the reader's mind. The work develops a distinctly Aristotelian picture of God and the cosmos while paying tribute to pre-Aristotelian philosophers and avoiding open criticism of rival schools of philosophy. De mundo exercised considerable influence in late antiquity and then in the Renaissance and Early Modern times.

Metamathematics and the Philosophical Tradition is the first work to explore in such historical depth the relationship between fundamental philosophical quandaries regarding self-reference and meta-mathematical notions of consistency and incompleteness. Using the insights of twentieth-century logicians from Gödel through Hilbert and their successors, this volume revisits the writings of Aristotle, the ancient skeptics, Anselm, and enlightenment and seventeenth and eighteenth century philosophers Leibniz, Berkeley, Hume, Pascal, Descartes, and Kant to identify ways in which these both encode and evade problems of a priori definition and self-reference. The final chapters critique and extend more recent insights of late 20th-century logicians and quantum physicists, and offer new applications of the completeness theorem as a means of exploring "metatheoretical ascent" and the limitations of scientific certainty. Broadly syncretic in range, Metamathematics and the Philosophical Tradition addresses central and recurring problems within epistemology. The volume’s elegant, condensed writing style renders accessible its wealth of citations and allusions from varied traditions and in several languages. Its arguments will be of special interest to historians and philosophers of science and mathematics, particularly scholars of classical skepticism, the Enlightenment, Kant, ethics, and mathematical logic.