The Stoics’ theory of kataleptic impressions looks different once we attend to their analysis of the Sorites paradox. In defending this view, I reject the long-standing assumption that the Stoics develop their theory by focusing on sensory impressions. The Stoic approach to vagueness shows, for example, that non-sensory impressions can be seemingly indistinguishable by belonging to a series. It also draws attention to an understudied dimension of Stoic theory: in aiming to assent only to kataleptic impressions, one aims to avoid (...) not only assent to false impressions but also assent to those that are neither true nor false. (shrink)

Most modern readers of the Stoics think first of later authors such as Seneca, Epictetus and Marcus Aurelius. Existing works like Long and Sedley's The Hellenistic Philosophers concentrate on the Stoics of the early school. This book focusses on the more influential later school, including key figures like Panaetius and Posidonius, and provides well-chosen selections from the full range of Stoic thinkers. It emphasizes their important work in logic, physics and cosmology as well as in ethics. Fresh translations and incisive (...) commentary present a picture of Stoic thought informed by up-to-date historical research and philosophical analysis. The book will be essential for scholars and students of ancient philosophy and of Hellenistic and Roman culture. (shrink)

One Stoic response to the skeptical indistinguishability argument is that it fails to account for expertise: the Stoics allow that while two similar objects create indistinguishable appearances in the amateur, this is not true of the expert, whose appearances succeed in discriminating the pair. This paper re-examines the motivations for this Stoic response, and argues that it reveals the Stoic claim that, in generating a kataleptic appearance, the perceiver’s mind is active, insofar as it applies concepts matching the perceptual stimulus. (...) I argue that this claim is reflected in the Stoic definition of the kataleptic appearance, and that it respects their more general account of mental representation. I further suggest that, in attributing some activity to the mind in creating each kataleptic appearance, and in claiming that the expert’s mind allows her to form more kataleptic appearances than the amateur, the Stoics draw inspiration from the wax tablet model in Plato’s Theaetetus (190e–196d), where Socrates distinguishes the wise from the ignorant on the basis of how well they match sensory input with its appropriate mental ‘seal’ (σφραγίς). (shrink)

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)

In this extended essay, I argue that Frege plagiarized the Stoics --and I mean exactly that-- on a large scale in his work on the philosophy of logic and language as written mainly between 1890 and his death in 1925 (much of which published posthumously) and possibly earlier. I use ‘plagiarize' (or 'plagiarise’) merely as a descriptive term. The essay is not concerned with finger pointing or casting moral judgement. The point is rather to demonstrate carefully by means of detailed (...) evidence that there are numerous (over a hundred) and extensive parallels both in formulation and --more importantly-- in content between the Stoics and Frege, parallels so plentiful that one would be hard pressed to brush them off as coincidence. These parallels include several that appear to occur in no other modern works that were published before Frege’s own and were accessible to him. Additionally, a cluster of corroborating historical data is adduced to support the suggestion, showing how easy it would have to been for Frege to plagiarize the Stoics. This (first) part of the essay is easy to read and vaguely entertaining, or so I hope. -/- (Corrigendum: At school, Frege likely had seven, not ten, years of intensive Latin and four years of intensive ancient Greek courses.). (shrink)

We argue that the extant evidence for Stoic logic provides all the elements required for a variable-free theory of multiple generality, including a number of remarkably modern features that straddle logic and semantics, such as the understanding of one- and two-place predicates as functions, the canonical formulation of universals as quantified conditionals, a straightforward relation between elements of propositional and first-order logic, and the roles of anaphora and rigid order in the regimented sentences that express multiply general propositions. We consider (...) and reinterpret some ancient texts that have been neglected in the context of Stoic universal and existential propositions and offer new explanations of some puzzling features in Stoic logic. Our results confirm that Stoic logic surpasses Aristotle’s with regard to multiple generality, and are a reminder that focusing on multiple generality through the lens of Frege-inspired variable-binding quantifier theory may hamper our understanding and appreciation of pre-Fregean theories of multiple generality. (shrink)

According to the ancient Greek Stoics, the cosmos regularly transitions between periods of conflagration, during which only fire exists, and periods of cosmic order, during which the four elements exist. This paper examines the cosmogonic process by which conflagrations are extinguished and cosmic orders are restored, and it defends three main conclusions. First, I argue that not all the conflagration’s fire is extinguished during the cosmogony, against recent arguments by Ricardo Salles. Second, at least with respect to the cosmogony, it (...) is not necessary to posit the existence of proto-elements. Third, while scholars such as Salles and David Hahm have argued that Cleanthes held a distinct theory of cosmogony from Zeno and Chrysippus, I argue that each of these Stoics endorse the same cosmogonic theory. (shrink)

After Plato's Forms, and Aristotle's substances, the Stoics posited the fundamental reality of lekta - the meanings of sentences, distinct from the sentences themselves. This volume analyses the resulting unique, complex, and consistent cosmic view in which lekta are the keystones of the structure of reality: they are all there is to say.

Hellenistic philosophy concerns the thought of the Epicureans, Stoics, and Skeptics, the most influential philosophical groups in the era between the death of Alexander the Great and the defeat of the last Greek stronghold in the ancient world. The Routledge Handbook of Hellenistic Philosophy provides accessible yet rigorous introductions to the theories of knowledge, ethics, and physics belonging to each of the three schools. It explores the fascinating ways in which interschool rivalries shaped the philosophies of the era, and offers (...) unique insight into the relevance of Hellenistic views to issues today, such as environmental ethics, consumerism, and bioethics. Eleven countries are represented among the Handbook's thirty-five authors, whose chapters were written specifically for this volume and are organized thematically into six sections: I. The people, history, and methods of Epicureanism, Stoicism, and Skepticism. II. Earlier philosophical influences on Hellenistic thought, such as Aristotle, Socrates, and Presocratics. III. The soul, perception, and knowledge. IV. God, fate, and the primary principles of nature and the universe. V. Ethics, political theory, society, and community. VI. Hellenistic philosophy's relevance to contemporary life. Spanning from the ancient past to the present, this Handbook aims to show that Hellenistic philosophy has much to offer all thinking people of the twenty-first century. (shrink)

Cet article vise à comprendre la théorie stoïcienne de la deixis afin d’expliquer l’importance accordée par les stoïciens aux pronoms démonstratifs et aux énoncés qu’ils composent, c’est-à-dire les propositions dites définitives. Nous montrons que ces propositions sont privilégiées pour des raisons à la fois ontologiques et épistémologiques en raison des propriétés sémantiques de leur sujet. Elles sont privilégiées d’un point de vue ontologique parce que la deixis grâce à laquelle leur sujet fait référence au réel crée une relation privilégiée à (...) la matière, la catégorie ontologique stoïcienne fondamentale. De plus, ces sujets requièrent que leur référent existe et soit présent et saisissable. Ces énoncés sont d’autre part privilégiés d’un point de vue épistémologique parce qu’ils sont fondamentaux dans l’acquisition de la connaissance. Nous suggérons enfin que tous les énoncés apparemment définis ne le sont pas en effet, et considérons quand et sous quelles conditions une référence déictique est réussie. (shrink)

This paper offers a new defense of the externalist interpretation of the kataleptic impression. My strategy is to situate the kataleptic impression within the larger context of the Stoic account of expertise. I argue that, given mastery in recognizing the limitations of her own state of mind, the subject can restrict her assent to kataleptic impressions, even if they are phenomenologically indistinguishable from those which are not kataleptic.

Here I propose an interpretation of the ancient Stoic psychological theory on which (i) the concepts that an adult human possesses affect the content of the perceptual impressions (φαντασίαι αἰσθητικαί) she forms, and (ii) the content of such impressions is exhausted by an ‘assertible’ (ἀξίωμα) of suitable complexity. What leads the Stoics to accept (i) and (ii), I argue, is their theory of assent and belief formation, which requires that the perceptual impression communicate information suitable to serve as the content (...) of belief. In arguing for (i), I reject a rival interpretation on which conceptualization occurs subsequently to the formation of a perceptual impression. In arguing for (ii), I deny that perceptual impressions have two kinds of content: one formulated in an assertible, the other sensory, featuring independently of this assertible. I explore the implications of (i) and (ii) for the Stoic theory of emotions, expertise, and rationality, and argue that they shed new light on the workings of impression, assent, and belief. (shrink)

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)

This paper analyzes the apraxia argument in Cicero’s Academica. It proposes that the argument assumes two modes: the evidential mode maintains that skepticism is false, while the pragmatic claims that it is disadvantageous. The paper then develops a tension between the two modes, and concludes by exploring some differences between ancient and contemporary skepticism.

Literature on the Stoa usually concentrates on historical accounts of the development of the school and on Stoicism as a social movement. In this 1977 text, Professor Rist's approach is to examine in detail a series of philosophical problems discussed by leading members of the Stoic school. He is not concerned with social history or with the influence of Stoicism on popular beliefs in the Ancient world, but with such questions as the relation between Stoicism and the thought of Aristotle, (...) the meaning and purpose of such Stoic paradoxes as 'all sins are equal', and the philosophical interrelation of Stoic physics and ethics. There are chapters on aspects of Stoic logic and on the thought of particular thinkers such as Panaetius and Posidonius, but ethical problems occupy the centre of the stage. (shrink)

Stoicism is now widely recognised as one of the most important philosophical schools of ancient Greece and Rome. But how did it influence Western thought after Greek and Roman antiquity? The question is a difficult one to answer because the most important Stoic texts have been lost since the end of the classical period, though not before early Christian thinkers had borrowed their ideas and applied them to discussions ranging from dialectic to moral theology. Later philosophers became familiar with Stoic (...) teachings only indirectly, often without knowing that an idea came from the Stoics. The contributors recruited for this volume, first published in 2004, include some of the leading international scholars of Stoicism as well as experts in later periods of philosophy. They trace the impact of Stoicism and Stoic ideas from late antiquity through the medieval and modern periods. (shrink)

In this book I look at the tradition of eudaimonistic ethics which stems from Aristotle's treatment of ethics, and which takes distinct, though related forms in Epicurus, the Stoics and the Sceptics. I look at this tradition from different points of view: how is it related to human nature, how does it account for other-related virtue and action, and how much does it require in terms of revising previously held priorities. I discuss the methodology of discussing ancient texts in ways (...) that relate them to contemporary concerns, particularly the importance of respecting the texts and avoiding anachronism. (shrink)

The third and fourth books of Cicero's _Tusculan Disputations_ deal with the nature and management of human emotion: first grief, then the emotions in general. In lively and accessible style, Cicero presents the insights of Greek philosophers on the subject, reporting the views of Epicureans and Peripatetics and giving a detailed account of the Stoic position, which he himself favors for its close reasoning and moral earnestness. Both the specialist and the general reader will be fascinated by the Stoics' analysis (...) of the causes of grief, their classification of emotions by genus and species, their lists of oddly named character flaws, and by the philosophical debate that develops over the utility of anger in politics and war. Margaret Graver's elegant and idiomatic translation makes Cicero's work accessible not just to classicists but to anyone interested in ancient philosophy and psychotherapy or in the philosophy of emotion. The accompanying commentary explains the philosophical concepts discussed in the text and supplies many helpful parallels from Greek sources. (shrink)

This major collection of essays offers the first serious challenge to the traditional view that ancient and modern ethics are fundamentally opposed. In doing so, it has important implications for contemporary ethical thought, as well as providing a significant re-assessment of the work of Aristotle, Kant and the Stoics. The contributors include internationally recognised interpreters of ancient and modern ethics. Four pairs of essays compare and contrast Aristotle and Kant on deliberation and moral development, eudaimonism, self-love and self-worth, and practical (...) reason and moral psychology. The final pair of essays introduces the Stoics as an example of how the apparently antithetical views of Aristotle and the Stoics might be reconciled. (shrink)

This unique volume offers an odyssey through the ideas of the Stoics in three particular ways: first, through the historical trajectory of the school itself and its influence; second, through the recovery of the history of Stoic thought; third, through the ongoing confrontation with Stoicism, showing how it refines philosophical traditions, challenges the imagination, and ultimately defines the kind of life one chooses to lead. A distinguished roster of specialists have written an authoritative guide to the entire philosophical tradition. The (...) first two chapters chart the history of the school in the ancient world, and are followed by chapters on the core themes of the Stoic system: epistemology, logic, natural philosophy, theology, determinism, and metaphysics. There are two chapters on what might be thought of as the heart and soul of the Stoics system: ethics. (shrink)

Diese 1896 begründete Reihe erfasst seltene griechische und lateinische Texte mit Übersetzungen und Kommentaren sowie ausführliche Einleitungen und macht sie einem weiteren wissenschaftlichen Publikum zugänglich. Als Schwerpunkt der Reihe gilt seit 2000 "Homers Ilias. Gesamtkommentar"; hier wird Homers Ilias im Text (von M. L. West) mit Übersetzung (von J. Latacz) und mit Kommentar in deutscher Sprache geboten.

Void is at the heart of Stoic metaphysics. As the incorporeal par excellence, being defined purely in terms of lacking body, it brings into sharp focus the Stoic commitment to non-existent Somethings. This article argues that Stoic void, far from rendering the Stoic system incoherent or merely ad hoc, in fact reflects a principled and coherent physicalism that sets the Stoics apart from their materialist predecessors and atomist neighbors.

At the heart of the Stoic theory of modality is a strict commitment to bivalence, even for future contingents. A commitment to both future truth and contingency has often been thought paradoxical. This paper argues that the Stoic retreat from necessity is successful. it maintains that the Stoics recognized three distinct senses of necessity and possibility: logical, metaphysical and providential. Logical necessity consists of truths that are knowable a priori. Metaphysical necessity consists of truths that are knowable a posteriori, a (...) world order according to certain metaphysical principles and natures that god crafts within the constraints of matter. Finally, what is providentially necessary is what occurs according to the chain of fate, but only once it is in process or past. -/- The method of the paper is a close reading of Diogenes Laertius 7.75, adducing broad textual evidence along the way, to show that the Stoic theory of modality embraces Philonian possibility, both that which is capable of being true as a matter of logical consistency, and that which is possible according to the bare fitness of the entity. What differentiates the Stoics from Philo is their additional commitment to possibility as opportunity, resisting the collapse of determinism into necessity. (shrink)

This paper examines the Stoic account of apprehension (κατάληψις) (a cognitive achievement similar to how we typically view knowledge). Following a seminal article by Michael Frede (1983), it is widely thought that the Stoics maintained a purely externalist causal account of apprehension wherein one may apprehend only if one stands in an appropriate causal relation to the object apprehended. An important but unanswered challenge to this view has been offered by David Sedley (2002) who offers reasons to suppose that the (...) Stoics (or at least Zeno, the founder of the Stoa) did not make such a causal stipulation. I offer a defence of the traditional, causal reading against the challenges raised by Sedley but also argue, against the traditional view, that the Stoic account incorporated an internalist element. On the hybrid account defended here, in order to apprehend not only must the agent stand in an appropriate causal relation to the object apprehended but the agent’s appearance of the object must also be clear (a feature which is accessible to the epistemic agent). The traditional scholarly view rejects internalist interpretations because it is thought that such interpretations cannot make sense of the Stoics’ discussion of the ‘automatic assent’ produced by kataleptic appearances and a purely externalist view is taken to be charitable insofar as it saves the Stoics from a vicious regress which they would otherwise face (were they internalists). I spell out how the regress might be taken to function and defend an internalist interpretation against both these charges. The internalist element embraced by the Stoics does not lead to the problems it is often thought to and the account defended here not only does justice to the textual evidence but also sheds light on the Stoic debates with their sceptical opponents and grants the Stoics an epistemic account fit for purpose. (shrink)

In "Pursuits of Wisdom," John Cooper brings this crucial question back to life. This marvelous book will shape the way we think about and engage with ancient philosophical traditions.

ABSTRACT: This paper discusses ancient versions of paradoxes today classified as paradoxes of presupposition and how their ancient solutions compare with contemporary ones. Sections 1-4 air ancient evidence for the Fallacy of Complex Question and suggested solutions, introduce the Horn Paradox, consider its authorship and contemporary solutions. Section 5 reconstructs the Stoic solution, suggesting the Stoics produced a Russellian-type solution based on a hidden scope ambiguity of negation. The difference to Russell's explanation of definite descriptions is that in the Horn (...) Paradox the Stoics uncovered a hidden conjunction rather than a hidden existential sentence. Sections 6 and 7 investigate hidden ambiguities in 'to have' and 'to lose' (including inalienable and alienable possession) and ambiguities of quantification based on substitution of indefinite plural expressions for indefinite or anaphoric pronouns, and Stoic awareness of these. Section 8 considers metaphorical readings and allusions that add further spice to the paradox. (shrink)

ABSTRACT: A detailed presentation of Stoic logic, part one, including their theories of propositions (or assertibles, Greek: axiomata), demonstratives, temporal truth, simple propositions, non-simple propositions(conjunction, disjunction, conditional), quantified propositions, logical truths, modal logic, and general theory of arguments (including definition, validity, soundness, classification of invalid arguments).

Seneca's Letters to Lucilius are a rich source of information about ancient Stoicism, an influential work for early modern philosophers, and a fascinating philosophical document in their own right. This selection of the letters aims to include those which are of greatest philosophical interest. In addition to examining the philosophical content of each letter, Brad Inwood's commentary discusses their literary and historical background.

ABSTRACT: For the Stoics, a syllogism is a formally valid argument; the primary function of their syllogistic is to establish such formal validity. Stoic syllogistic is a system of formal logic that relies on two types of argumental rules: (i) 5 rules (the accounts of the indemonstrables) which determine whether any given argument is an indemonstrable argument, i.e. an elementary syllogism the validity of which is not in need of further demonstration; (ii) one unary and three binary argumental rules which (...) establish the formal validity of non-indemonstrable arguments by analysing them in one or more steps into one or more indemonstrable arguments (cut type rules and antilogism). The function of these rules is to reduce given non-indemonstrable arguments to indemonstrable syllogisms. Moreover, the Stoic method of deduction differs from standard modern ones in that the direction is reversed (similar to tableau methods). The Stoic system may hence be called an argumental reductive system of deduction. In this paper, a reconstruction of this system of logic is presented, and similarities to relevance logic are pointed out. (shrink)

This book provides a lucid, comprehensive introduction to this great philosophical school.

Ancient Stoics repeatedly stressed the monolithic unity of their philosophy. In this ground breaking "essay" Johnny Christensen takes their claim at face value: "It is a presupposition of the present essay that Stoic philosophy is a coherent and consistent system of thought", he says, and "The Stoic Philosopher is a man caught by the quest for unity. If this life is to make sense, all of it must be taken into account and somehow justified. Therefore Reality must be rational, not (...) random, and organically one". In four concise sections, Christensen lays out the core ideas of Stoicism and their interconnection, never losing himself in details. The exposition is philosophically penetrating and lucid at the same time. Originally published in 1962, when it was far too modern for its time, this small but exceedingly generous study constitutes the most holistic grasp of Stoicism to date. Offering a deep appreciation of, and insightful meditation on, Stoicism, this study is required reading for anyone interested in the history of philosophy. (shrink)

This is a collective study, in nine new essays, of the close connection between theology and cosmology in Stoic philosophy.

Christopher Gill offers a new analysis of what is innovative in Hellenistic--especially Stoic and Epicurean--philosophical thinking about selfhood and personality. His wide-ranging discussion of Stoic and Epicurean ideas is illustrated by a more detailed examination of the Stoic theory of the passions and a new account of the history of this theory. His study also tackles issues about the historical study of selfhood and the relationship between philosophy and literature, especially the presentation of the collapse of character in Plutrarch's Lives, (...) Senecan tragedy, and Virgil's Aeneid. As all Greek and Latin is translated, this book presents original ideas about ancient concepts of personality to a wide range of readers. (shrink)

Tad Brennan explains how to live the Stoic life--and why we might want to. Stoicism has been one of the main currents of thought in Western civilization for two thousand years: Brennan offers a fascinating guide through the ethical ideas of the original Stoic philosophers, and shows how valuable these ideas remain today, both intellectually and in practice. He writes in a lively informal style which will bring Stoicism to life for readers who are new to ancient philosophy. The Stoic (...) Life will also be of great interest to philosophers and classicists seeking a full understanding of the intellectual legacy of the Stoics. (shrink)

The basis of stoic determinism (a) : everything has a cause -- The basis of stoic determinism (b) : causation is necessitating -- The threat of external determination -- Reflection and responsibility -- The three compatibilist theories of Chrysippus -- Epictetus on responsibility for unreflective action.

Richard Sorabji presents a ground-breaking study of ancient Greek views of the emotions and their influence on subsequent theories and attitudes, Pagan and Christian. While the central focus of the book is the Stoics, Sorabji draws on a vast range of texts to give a rich historical survey of how Western thinking about this central aspect of human nature developed.

Bobzien presents the definitive study of one of the most interesting intellectual legacies of the ancient Greeks: the Stoic theory of causal determinism. She explains what it was, how the Stoics justified it, and how it relates to their views on possibility, action, freedom, moral responsibility, moral character, fatalism, logical determinism and many other topics. She demonstrates the considerable philosophical richness and power that these ideas retain today.

"Not only one of the best but also the most comprehensive treatment of Stoicism written in this century." --Times Literary Supplement.

Of the rich legacy of the Timaeus, this study deals with the cross-pollination between Stoic and Platonist readings of Timaeus, spanning the period from Plato's writings to that of the so-called Middle Platonist authors. Plato's Timaeus and Stoic doctrine had their fates intertwined from very early on, both in polemical and reconciliatory contexts. The blend of Platonic and Stoic elements ultimately constituted one of the main conceptual bridges between the pagan tradition on the one hand and the Judeo-Christian, in its (...) own search for the distinction between transcendence and immanence, on the other. Contrary to the received opinion, later platonist authors do not merely borrow Stoic terminology. Rather, in a genuine 'discourse of assimilation' the Stoic analysis of the universe has left a profound mark on Platonist views of the principles, of the place of humans in the universe, as well as of human freedom and its interaction with divine Providence. (shrink)

This book reconstructs in detail the older Stoic theory of the psychology of action, discussing it in relation to Aristotelian, Epicurean, Platonic, and some of the more influential modern theories. Important Greek terms are transliterated and explained; no knowledge of Greek is required.

This essay argues the Stoics are rightly regarded as pantheists. Their view differs from many forms of pantheism by accepting the notion of a personal god who exercises divine providence. Moreover, Stoic pantheism is utterly inimical to a deep ecology ethic. I argue that these features are nonetheless consistent with the claim that they are pantheists. The essay also considers the arguments offered by the Stoics. They thought that their pantheistic conclusion was an extension of the best science of their (...) day. Some of their most interesting arguments are thusa posteriori. (shrink)

ABSTRACT: Recently a bold and admirable interpretation of Chrysippus’ position on the Sorites has been presented, suggesting that Chrysippus offered a solution to the Sorites by (i) taking an epistemicist position1 which (ii) made allowances for higher-order vagueness. In this paper I argue (i) that Chrysippus did not take an epistemicist position, but − if any − a non-epistemic one which denies truth-values to some cases in a Sorites-series, and (ii) that it is uncertain whether and how he made allowances (...) for higher-order vagueness, but if he did, this was not grounded on an epistemicist position. (shrink)

This paper examines some neglected Chrysippean fragments on insecure apprehension (κατάληψις). First, I present Chrysippus’ account of how non-Sages can begin to fortify their insecure apprehension and upgrade it into knowledge (ἐπιστήμη). Next, I reconstruct Chrysippus’ explanation of how sophisms and counter-arguments lead one to abandon one’s insecure apprehension. One such counter-argument originates in the sceptical Academy and targets the Stoic claim that insecure apprehension can be acquired on the basis of custom (συνήθεια). I show how Chrysippus could defend the (...) possibility of custom-based apprehension, while also denying that there is custom-based knowledge. (shrink)

Stoicism is two things: a long past philosophical school of ancient Greece and Rome, and an enduring philosophical movement that still inspires people in the twenty-first century to re-think and re-organize their lives in order to achieve personal satisfaction. Brad Inwood presents the long history that connects these.