This chapter, which serves as the introduction, outlines the objectives and key questions of the volume, reviews existing scholarship on ancient women philosophers, and highlights the original philosophical contributions of each chapter. A substantial section is devoted to the specific challenges in the study of ancient women philosophers, with special focus on source issues, as well as the methods the contributors of the volume have adopted to face these challenges and approach these female thinkers philosophically. We argue that the study of ancient women philosophers has a special value for our understanding of the history of philosophy. While at first daunting, this unique set of thinkers and the available evidence both enrich our insight into the methodology of the history of philosophy and re-introduce philosophical contributions which would otherwise be lost.

Arete of Cyrene was daughter and disciple of the founder of the Cyrenaic school and mother and teacher of the figure who codified its principles. Our sources emphasize her as a link in the intellectual chain connecting the school it its Socratic roots, to the detriment of preserving her own philosophical ideas. In this chapter, I make a case for her philosophical contribution to the Cyrenaics, as revealed in a careful reading of the few sources we have. I follow this with methodological reflections on how we might access a figure like Arete. I argue that this task requires and licenses the adoption of severed methodological strategies related to an added open-mindedness to source material. I reflect on how these methodological points contribute to a wider project of recovering the thought of marginalized figures.

This chapter traces philosophy of music from its origins until the end of the classical period. Four major questions dominated ancient philosophy of music. Ancient philosophers asked about the nature of music, and they debated whether music is a mimetic (imitative) art. The second question concerned the relationship between musical harmony and the world. Many ancient philosophers believed that musical harmony provides the key to understanding reality, including the human soul and the motions of celestial bodies. The third question concerned the value of music. Some philosophers held that music is valuable as a source of pleasure, while others believed that music could improve or corrupt the characters of listeners, and still others talked about the beauty of music. The final question concerned musical genius and the Platonic and Longinian accounts of genius emerged. Pythagoras, Plato, Aristotle, Aristides Quintilianus, Lucretius, the Epicureans, Augustine, Quintilian, Boethius, Sextus Empiricus, Ptolemy and Longinus are among the writers discussed.

The introduciton opens my exploration of Cicero’s notion of will. I argue that the will is an original Latin contribution to the Western mind. Cicero’s letters, speeches, and treatises show how his skill for language gave him a subtler take on events and a richer repertoire of persuasion. Practical uses of will are foremost: mapping alliances, winning elections, and navigating the “economy of goodwill.” From his earliest writings, however, voluntas emerges in normative claims about law and politics: that Rome’s mass of precedents could be rationalized through Greek ideas. Chief among these is Plato’s precept that reason must rule, and thus an alliance of philosophy and tradition can save the dying Republic. Transmuting political failure into philosophical innovation, Cicero lays the foundation for an idea – the will and its freedom – with tremendous consequences for Western thought. For Cicero, voluntas populi becomes the binding force of a nominally popular but functionally aristocratic constitution. If this state of affairs looks familiar in today’s “democratic” republics, we have Cicero in part to thank. Insistence on the singularity of popular will and mistrust of the common citizen lie at the heart of today’s political crisis and will require Ciceronian creativity to fix.

This chapter is dedicated to the theory of selfhood Cicero presents in the De officiis: each person being a player of four personae. The allegory of four dramatic roles or masks (from the Greek prosopon) is borrowed from the Stoic Panaetius, whose ethical theory adapts the stringent demands of the sage to a morally imperfect and multifarious public. He who wishes to progress, Cicero explains, must play the roles of reason, of nature, of fortune, and, finally, the role “we ourselves may choose sets forth from our will” (quam personam velimus, a nostra voluntate proficiscitur). In this final treatise, the will comes most clearly into view as a mental capacity and rational force. I argue that when read in conjunction with related uses of voluntas and persona in other texts, Cicero’s will serves a recursive purpose within each of the other personae. Whether in actualizing reason, refining our inborn qualities, or navigating the forces of necessity and civic duty, voluntas creates a dialectic of actor and mask from which emerges a conscious moral self. Though the will develops richly as a moral faculty and principium individuationis in the hands of later thinkers, its terrestrial purposes disappear as divine ones take hold.

In this chapter, we see how Cicero, as a rising Roman politician, uncovers hidden lines of influence, pinpoints shades of political support, and frames partisan divides in the Roman Republic. Here, Cicero uses voluntas both to analyze politics as he finds it and to argue for its rational improvement. Descriptively, Cicero uses voluntate and summa voluntate to identify subtler shades of opposition or support and to trace lines of unseen influence among Rome’s leading men like Pompey and Caesar. Through his gifted pen, will becomes a measurable force as it had seemingly not been before. To measure will is to rationalize it, and Cicero builds new philosophical arguments for the primacy of voluntas over violence and for a vision of politics that transacts power rationally by the intersecting wills of magistrates and people. I use powermapping, a tool of modern advocacy, as a lens to examine Cicero’s political strategy and use of language. This vision, at once old and new, is upended by the ascent of Caesar, whose sole voluntas undoes Cicero’s rational framework, exerting will by brute force and eliminating the old pluralist order.

With the Tusculan Disputations, willpower enters Western thought. This chapter departs from a peculiar decision Cicero makes in his account of the human soul. In previous centuries, Platonists and Stoics had bitterly disagreed on whether the soul was unified or divided into rational and nonrational parts. In the Tusculan Disputations, Cicero announces that he will combine Stoic moral stricture – predicated on the soul’s unity – with Plato’s divided, self-moving soul. The result is a new narrative of inner struggle in which voluntas gains a formal definition at last: “that which desires with reason” (quae quid cum ratione desiderat) (Tusc. 4.12). While drawing importantly on the Hellenistic schools of philosophy, the Latin “force” of volition is foremost. Here, Cicero links together lines of debate that in Greek had run in parallel, rendering hekon, boulesis, and prohairesis by voluntarius and voluntas. His “struggle for reason” thus moves originally beyond Greek accounts of askesis, moral training that emphasized education and cognitive clarity over present effort. An orator zealous to persuade, Cicero paints his account of reason in Roman colors of honor, endurance, and painstaking progress.

Throughout the early modern period, the vast majority of natural philosophers remained deeply invested in exploring the meaning of ancient philosophical texts—there was no anti-humanist turn initiated by Descartes. Discussion of ancient philosophy was used, above all, in a genealogical manner, to shed light on the historical origins of doctrinal or methodological error. Accordingly, calls for a “return” to the philosophy of the presocratics, of Hippocrates, etc., should not be understood as simplistic recourse to authority, but rather as historico-methodological arguments about the disciplinary identity of natural philosophy. Indeed, natural-philosophical innovators were often more sure of what they stood against than what exactly they stood for. Seen from this perspective, the “philosophy of the Scientific Revolution” was an anti-philosophy, driven primarily by the colonization of the discipline by physicians on the one hand and mixed mathematicians on the other; the two groups eventually coming to work in tandem to squeeze out anything that looked like metaphysical physics.

This chapter shows how Lucretius repeatedly draws parallels between the human soul and the stars in DRN 3. These parallels are achieved through intertextual reference to the Aratea, Cicero’s poem on the stars. In drawing as densely on the Aratea as it demonstrably does, the DRN creates a problem for its interpretation. The Aratea, a translation of the Phaenomena of the Hellenistic poet Aratus, is a text with a markedly Stoic orientation, as I’ve shown elsewhere (Gee 2001 and 2013). The Stoic approach to the stars and the soul is that of an intelligent-design philosophy, and therefore in opposition to Lucretius’ atomist understanding of the universe and mankind. What then is the meaning of Lucretius’ tapestry of allusions to the Aratea? This chapter shows how Lucretius deliberately hijacks a text in the opposing philosophical tradition as part of his polemical strategy. Through close readings it becomes clear that Lucretius eviscerates Cicero’s poem of its intelligent-design substance and substitutes his own Epicurean content in its stead. The reader familiar with the Aratea now views the Stoic poem through the mesh of allusions in the DRN, with the result that Lucretius has partially eclipsed the worldview of the Aratea and replaced it with his own.