This chapter examines the ancient Stoic theory of the physical composition of pneuma, how its composition relates to pneuma’s many causal roles in Stoic philosophy, and to what extent each of the first three leaders of the Stoic school accepted the claim that pneuma pervades the cosmos. I argue that pneuma is a compound of fire and air. Furthermore, many functions of pneuma can be reduced to the functions of these elements. Finally, it is likely that each of the early (...) Stoics posited a pervasive cosmic pneuma. This paper also explores the nature of pneuma’s tensile movement and offers an account of fire and air’s roles in causing its motion. (shrink)

The Cambridge Histories of philosophy, extending from Thales to the seventeenth century, are not a formal series. Nevertheless, they have a distinctive character: authoritative accounts that combine general coverage of a period with the individual contributions of their authors and indicate scholarly controversies. This volume is a worthy continuation of the tradition.

According to the Stoics, ordinary unified bodies—animals, plants, and inanimate natural bodies—each have a single cause of unity and being: pneuma. Pneuma itself has no distinct cause of unity; on the contrary, it acts as a cause of unity and being for itself. In this paper, I show how pneuma is supposed to be able to unify itself and other bodies in virtue of its characteristic tensile motion (τονικὴ κίνησις). Thus, we will see how the Stoics could have hoped to (...) account for corporeal unity by positing another body (pneuma) apparently itself in need of unification. (shrink)

A full account of the philosophy of the Greek and Roman worlds from the last days of Aristotle until 100 BC. Hellenistic philosophy, for long relatively neglected and unappreciated, has over the last decade been the object of a considerable amount of scholarly attention. Now available in paperback, this 1999 volume is a general reference work which pulls the subject together and presents an overview. The History is organised by subject, rather than chronologically or by philosophical school, with sections on (...) logic, epistemology, physics and metaphysics, ethics and politics. It has been written by specialists but is intended to be a source of reference for any student of ancient philosophy, for students of classical antiquity and for students of the philosophy of later periods. Greek and Latin are used sparingly and always translated in the main text. (shrink)

En este trabajo discuto el argumento de Crisipo a favor de la indestructibilidad del cosmos que aparece en Eusebio, Praeparatio Evangelica 15.18.1-3. Este argumento complementa al que aparece en Plutarco, De Stoicorum Repugnantiis1052C, pero descansa sobre una base distinta, a saber, la teoría de la disolución de los cuerpos complejos en los cuatro elementos y la teoría sobre cómo estos últimos se transforman los unos en los otros. Según veremos, existen antecedentes importantes de estas teorías en Anaxímenes y su teoría (...) del cambio. Al final, me ocupo de dos objeciones que los propios estoicos formularon en contra del argumento de Crisipo. (shrink)

After an introduction in which I rehearse some of the main elements of Stoic physics and psychology, I set out the evidence for the Stoic doctrine that the individual soul is both analogous to the cosmic soul and a part of it, as was held by the early exponents of the school (Section I). I argue that the doctrine threatened to land the Stoics in trouble, unless they were ready to qualify it by applying to it certain distinctions (Section II). (...) Then I consider the doctrine’s historical origins, discussing several possible antecedents of it, with a focus on a Socratic report in Xenophon and on Plato’s dialogues, and showing that the Stoics went beyond all their predecessors (Section III). After this historical excursus I turn to examine some of the arguments advanced by the early Stoics to prove that the cosmos has a soul, including one which compares the relation between the cosmos and the individual human beings to that between a father and his offspring (Section IV). This leads me to analyse in more detail this comparison, which occurs also in other contexts and is sometimes problematically connected with the notion that the individual soul is a part of the cosmic soul (Section V). One of the texts which are relevant to this issue, a report in Sextus Empiricus, is the object of a separate discussion in the final Appendix. (shrink)