Sources for Stoicism present conflicting accounts of the Stoic principles. Some suggest that the principles are inseparable from each other. Others suggest that they are separable. To resolve this apparent interpretive dilemma, I distinguish between the functions of the principles and the bodies that realize those functions. Although the principles cannot separate when realizing their roles, the Stoic theory of blending entails that the bodies that realize those roles are physically separable. I present a strategy for further work on the (...) principles in light of this interpretation. (shrink)

Interpreters and even the sources of stoicism tend to equate the notions of providence, rationality and natural law. In contrast to this trend, the goal of this article is to analyze these notions in order to identify what is the explanatory role attributed by the Stoics to each one of them. This will provide a better understanding of the Stoic theory of the constitution of the world and the different roles played by the divine mind in it. I will defend (...) that providence is a function of the divine will, related to the goal sought in the constitution of the world. The divine rationality refers to the logical and causal requirements to be observed in this constitution. And the notion of natural law refers to a normative aspect of nature established by the divine right reason. (shrink)

This paper first examines surviving testimonies on the doctrine of the Great Year in Heraclitus and attempts to demonstrate the reliability of Aëtius’ version handed down by the mss., according to which the Great Year is equal to 18,000 solar years. On the basis of such evidence it is also possible to newly examine Diogenes of Babylon’s views about this topic. In the second part, the paper better defines the relationship between the Great Year and the theory of cosmic conflagration. (...) It argues that in the sources at our disposal there are enough elements to credit Heraclitus with the doctrine of Ekpyrosis, although, in all probability, the philosopher never provided an in-depth description of it. Finally, the same problem is analysed in relation to Diogenes of Babylon. In the most mature phase of his career, this Stoic departed from the Ekpyrosis doctrine of the early Stoics and especially of his master Chrysippus. The paper formulates some hypotheses on the reasons for this choice (arguing that it most probably reflects an original attitude towards Heraclitus on Diogenes’ part) and highlights that it was hardly an isolated, ‘heterodox’ stance during the final phase of the early Stoa. (shrink)

Chrysippe a élaboré une stratégie contre l’argument Dominateur de Diodore afin d’éviter le nécessitarisme impliqué par le rejet des possibilités contrefactuelles. Alexandre d’Aphrodise lui oppose sa doctrine du retour périodique (Sur les Premiers Analytiques d’Aristote 180, 28 – 181, 34). Son objection repose sur une conception numérique de l’identité des individus à travers les cycles. Chrysippe n’admettant que leur ressemblance sinon leur stricte identité qualitative, sa doctrine du retour autorise les possibilités contrefactuelles.

Two literal quotations from Chrysippus’ On Possibles, preserved in Plutarch’s On the Contradictions of the Stoics, seem to contradict the Stoic thesis of the isotropy of the void. According to this thesis the void is an infinite undifferentiated expanse whose center is marked by, and coincides with, the position of the world. Since there is nothing else outside the world, the cohesive force that pervades it is sufficient on its own to guarantee the quasi–indestructibility of the trans–cyclical διακόσμησις and the (...) eternity of the οὐσία. Conversely, in these two quotations Chrysippus maintains that there is a central διαφορά equipped with causal force. This seems to imply the anisotropy of the void. Chrysippus’s view here is also at odds with another official Stoic thesis, i.e. that the incorporeal is causally inert. In this paper it will be argued that there is in fact no contradiction, because, in those two quotations, Chrysippus consciously develops a cosmological hypothesis in order to resolve a difficulty concerning the role of fire during the universal conflagration. Chrysippus’ solution to this difficulty belongs to modal logic and consists in distinguishing between the actual universe and the possible ones. (shrink)