We defend the view that we are not identical to organisms against the objection that it implies that there are two subjects of every conscious state one experiences: oneself and one’s organism. We then criticize animalism —the view that each of us is identical to a human organism—by showing that it has unacceptable implications for a range of actual and hypothetical cases of conjoined twinning : dicephalus, craniopagus parasiticus, and cephalopagus.

This handbook presents up-to-date theoretical analyses of problems associated with the moral standing of future people in current decision-making. Future people pose an especially hard problem for our current decision-making, since their number and their identities are not fixed but depend on the choices the present generation makes. Do we make the world better by creating more people with good lives? What do we owe future generations in terms of justice? Such questions are not only philosophically difficult and important, but (...) also directly relevant to many practical decisions and policy issues, including on climate, health, population control and taxation. If we are to adequately assess such issues, we must be able to determine the value of differently sized populations. The aim of this handbook is to shed light on the value of population change and the nature of our obligations to future generations, and to offer practical guidance to policy-makers as to how our duties to future generations should be discharged. It contains an extensive and accessible introduction for those unfamiliar with the topic of population ethics as well as original work from key figures in academic debates on population ethics covering three main themes: ways out of the paradoxes of population ethics, questioning some philosophical and methodological assumptions underlying these paradoxes, and several applications of population ethics to real world issues. (shrink)

In her ground-breaking and highly influential book Transformative Experience, L.A. Paul makes two claims: (1) one cannot evaluate and compare certain experiential outcomes (e.g. being a parent and being a non-parent) unless one can grasp what these outcomes are like; and (2) one can evaluate and compare certain intuitively horrible outcomes (e.g. being eaten alive by sharks) as bad and worse than certain other outcomes even if one cannot grasp what these intuitively horrible outcomes are like. We argue that the (...) conjunction of these two claims leads to an implausible discontinuity in the evaluability of outcomes. One implication of positing such a discontinuity is that evaluative comparisons of outcomes will not be proportionally sensitive to variation in the underlying features of these outcomes. This puts pressure on Paul to abandon either (1) or (2). But (1) is central to her view and (2) is very hard to deny. We call this the Shark Problem. (shrink)

Nicole Hassoun’s book Global Health Impact: Extending Access to Essential Medicines has three parts. Part 1 is about the right to health, Part 2 offers a concrete proposal for how to promote the ability of people in the developing world to live minimally good lives and Part 3 is concerned with consumer responsibility as it relates to global health. I argue that there is a philosophical tension between the respective projects of Parts 1 and 2. The project of Part 1 (...) reflects a sufficientarian ideal, namely ensuring that each person in our global community has the ability to live a minimally good life. But, the concrete proposal offered in Part 2 reflects a different ideal, namely maximizing global health benefit. While these two ideals may often converge on a set of feasible health outcomes that we should aim to bring about, they can also diverge. The extent to which they diverge depends on our specification of the minimally good life. It is therefore crucial that we have a criterion for distinguishing lives that are at least minimally good from those that are not. Unfortunately, Hassoun’s proposed criterion is problematic in that no life satisfies it. (shrink)

It is often acknowledged that public policies can constrain people's procreative opportunities, in some cases even infringing their procreative rights. However, a topic that is not often discussed is how the procreative choices of one generation can affect the procreative opportunities of later generations. In this article, we argue that the demographic fact that childbearing above the replacement fertility level is eventually unsustainable supports two constraints on universal procreation rights: a compossibility constraint and an egalitarian constraint. We explore the implications (...) of these two constraints and suggest that there are reasons to think of procreative opportunity as a finite resource that can be distributed more or less equally across generations. We also briefly discuss possible ways of meeting demands of intergenerational justice with respect to procreative opportunity. (shrink)

The Repugnant Conclusion served an important purpose in catalyzing and inspiring the pioneering stage of population ethics research. We believe, however, that the Repugnant Conclusion now receives too much focus. Avoiding the Repugnant Conclusion should no longer be the central goal driving population ethics research, despite its importance to the fundamental accomplishments of the existing literature.

All else being equal, creating a miserable person makes the world worse, and creating an ecstatic person makes it better. Such claims are easily justified if it can be better, or worse, for a person to exist than not to exist. But that seems to require that things can be better, or worse, for a person even in a world in which she does not exist. Ingmar Persson defends this seemingly paradoxical claim in his latest book, Inclusive Ethics. He argues (...) that persons that never exist are merely possible beings for whom non-existence is worse than existence with a good life. We argue that Persson's argument, as stated in his book, has false premises and is invalid. We reconstruct the argument to make it valid, but the premises remain highly problematic. Finally, we argue, one can make sense of our procreative obligations without letting merely possible beings into the moral club. (shrink)

Adequate discussion of individuals' moral deliberation is notably absent from much of the literature on corporate social responsibility (CSR). We argue for a refocusing on the role of the individual in that context. In particular we regard this as important in CSR course design, for practical, pedagogical and moral reasons. After addressing some of the theoretical background to our argument, and noting some respects in which individual action features in the context of CSR, we consider the usefulness (or otherwise) of (...) academic ethical theory in relation to CSR issues and dilemmas in practice. It is suggested that, without dispensing entirely with ethical theory, emphasis should be placed on informed debate and moral judgement among members of organisations (or seminar groups) and some short case examples are provided. Finally we suggest that such approaches may be appropriate if trends towards ‘mainstreaming’ concern for CSR throughout business school curricula are realised. (shrink)

Adequate discussion of individuals' moral deliberation is notably absent from much of the literature on corporate social responsibility (CSR). We argue for a refocusing on the role of the individual in that context. In particular we regard this as important in CSR course design, for practical, pedagogical and moral reasons. After addressing some of the theoretical background to our argument, and noting some respects in which individual action features in the context of CSR, we consider the usefulness (or otherwise) of (...) academic ethical theory in relation to CSR issues and dilemmas in practice. It is suggested that, without dispensing entirely with ethical theory, emphasis should be placed on informed debate and moral judgement among members of organisations (or seminar groups) and some short case examples are provided. Finally we suggest that such approaches may be appropriate if trends towards ‘mainstreaming’ concern for CSR throughout business school curricula are realised. (shrink)

The article Transformative experience and the shark problem, written by Tim Campbell and Julia Mosquera, was originally published electronically on the publisher’s Internet portal on 31 January 2020 without open access.

According to axiological retributivism, people can deserve what is bad for them and an outcome in which someone gets what she deserves, even if it is bad for her, can thereby have intrinsic positive value. A question seldom asked is how axiological retributivism should deal with comparisons of outcomes that differ with respect to the number and identities of deserving agents. Attempting to answer this question exposes a problem for axiological retributivism that parallels a well-known problem in population axiology introduced (...) by John Broome. The problem for axiological retributivism is that it supports the existence of a range of negative wellbeing levels such that if a deserving person comes into existence at any of these levels, the resulting outcome is neither better nor worse with respect to desert. However, the existence of such a range is inconsistent with a set of very plausible axiological claims. I call this the desert neutrality paradox. After introducing the paradox, I consider several possible responses to it. I suggest that one reasonable response, though perhaps not the only one, is to reject axiological retributivism. (shrink)

In the original publication of the article.

Persons, Interests, and Justice, by Nils Holtug. New York: Oxford University Press, 2010. Pp. vi + 352.

A popular approach to monothematic delusions in the recent literature has been to argue that monothematic delusions involve broadly rational responses to highly unusual experiences. Campbell calls this the empiricist approach to monothematic delusions, and argues that it cannot account for the links between meaning and rationality. In place of empiricism Campbell offers a rationalist account of monothematic delusions, according to which delusional beliefs are understood as Wittgensteinian framework propositions. We argue that neither Campbell's attack on empiricism (...) nor his rationalist alternative to empiricism is successful. (shrink)

Elisabeth Pacherie is a research fellow in philosophy at Institut Jean Nicod, Paris. Her main research and publications are in the areas of philosophy of mind, psychopathology and action theory. Her publications include a book on intentionality (_Naturaliser_ _l'intentionnalité_, Paris, PUF, 1993) and she is currently preparing a book on action and agency.

One of the tasks that recent philosophy of psychiatry has taken upon itself is to extend the range of understanding to some of those aspects of psychopathology that Jaspers deemed beyond its limits. Given the fundamental difficulties of offering a literal interpretation of the contents of primary delusions, a number of alternative strategies have been put forward including regarding them as abnormal versions of framework propositions described by Wittgenstein in On Certainty. But although framework propositions share some of the apparent (...) epistemic features of primary delusions, their role in partially constituting the sense of inquiry rules out their role in helping to understand delusions. (shrink)

The idea that psychiatry contains, in principle, a series of levels of explanation has been criticised both as empirically false but also, by Campbell, as unintelligible because it presupposes a discredited pre-Humean view of causation. Campbell’s criticism is based on an interventionist-inspired denial that mechanisms and rational connections underpin physical and mental causation respectively and hence underpin levels of explanation. These claims echo some superficially similar remarks in Wittgenstein’s Zettel. But attention to the context of Wittgenstein’s remarks suggests (...) a reason to reject explanatory minimalism in psychiatry and reinstate a Wittgensteinian notion of level of explanation. Only in a context broader than the one provided by interventionism is the ascription of propositional attitudes, even in the puzzling case of delusions, justified. Such a view, informed by Wittgenstein, can reconcile the idea that the ascription mental phenomena presupposes a particular level of explanation with the rejection of an a priori claim about its connection to a neurological level of explanation. (shrink)

Jaspers’s binary distinction between understanding and explanation has given way first to a proliferation of explanatory levels and now, in John Campbell’s recent work, to a conception of explanation with no distinct levels of explanation and no inbuilt rationality requirement. I argue that there is still a role for understanding in psychiatry and that is to demystify the assumption that the states it concerns are mental. This role can be fulfilled by placing rationality at the heart of understanding without (...) a commitment to the attempt to use rationality to shed light on interpretation and mindedness as though from outside those notions. Delusions still present a significant challenge to philosophical attempts at understanding, but this merely reflects the genuine clinical difficulties such states present. (shrink)

Sense-perception—the awareness or apprehension of things by sight, hearing, touch, smell and taste—has long been a preoccupation of philosophers. One pervasive and traditional problem, sometimes called “the problem of perception”, is created by the phenomena of perceptual illusion and hallucination: if these kinds of error are possible, how can perception be what it intuitively seems to be, a direct and immediate access to reality? The present entry is about how these possibilities of error challenge the intelligibility of the phenomenon of (...) perception, and how the major theories of perception in the last century are best understood as responses to this challenge. (shrink)

Detlef Dürr was a remarkable figure in many different ways. I recall some adventures we had with him in Abu Dhabi.

Explanation does not exist in a metaphysical vacuum. Conceptions of the structure of a phenomenon play an important role in guiding attempts to explain it, and erroneous conceptions of a phenomenon may direct investigation in misleading directions. I believe that there is a case to be made for thinking that much work on the neural underpinnings of consciousness—what is often called the neural correlates of consciousness—is driven by an erroneous conception of the structure of consciousness. The aim of this paper (...) is lay bare some connections between the explanation of consciousness and the structure of consciousness, and to argue for a conception of the structure of consciousness that is more adequate than that which currently drives much research into the neural correlates of consciousness. (shrink)

Modern epistemology has run into several paradoxes in its efforts to explain how knowledge acquisition can be both socially based and still able to determine objective facts about the world. In this important book, Richmond Campbell attempts to dispel some of these paradoxes, to show how they are ultimately just "illusions of paradox," by developing ideas central to two of the most promising currents in epistemology: feminist epistemology and naturalized epistemology. Campbell's aim is to construct a coherent theory (...) of knowing that is feminist and "naturalized." Illusions of Paradox will be valuable for students and scholars of epistemology and women's studies. (shrink)

Here is a template for introducing mathematical objects: “Objects are found in stages. For every stage S: (1) for any things found before S, you find at S the bland set whose members are exactly those things; (2) for anything, x, which was found before S, you find at S the result of tapping x with any magic wand (provided that the result is not itself a bland set); you find nothing else at S.” -/- This Template has rich applications, (...) it realizes John Conway’s (1976) Mathematicians’ Liberation Movement, and it generalizes a lovely idea due to Alonzo Church (1974). -/- Some parts of this Template are familiar: the bit about bland sets is just the ordinary story we tell about the cumulative iterative conception of set. But this talk of “magic wands” is new and different. Moreover, parts of the Template are left unspecified. -/- This under-specification is deliberate: we want to be able to flesh out the Template in umpteen different ways. The Main Theorem of the paper is that any loosely constructive way of fleshing out the Template is synonymous with a ZF-like theory. (shrink)

John McDowell's contribution to philosophy has ranged across Greek philosophy, philosophy of language, philosophy of mind, metaphysics and ethics. His writings have drawn on the works of, amongst others, Aristotle, Kant, Hegel, Frege, Russell, Wittgenstein, Sellars, and Davidson. His contributions have made him one of the most widely read, discussed and challenging philosophers writing today. This book provides a careful account of the main claims that McDowell advances in a number of different areas of philosophy. The interconnections between the different (...) arguments are highlighted and Tim Thornton shows how these individual projects are unified in a post-Kantian framework that articulates the preconditions of thought and language. Thornton sets out the differing strands of McDowell's work prior to, and leading up to, their combination in the broader philosophical vision revealed in "Mind and World" and provides an interpretative and critical framework that will help shape ongoing debates surrounding McDowell's work. An underlying theme of the book is whether McDowell's therapeutic approach to philosophy, which owes much to the later Wittgenstein, is consistent with the substance of McDowell's discussion of nature that uses the vocabulary of other philosophers including, centrally, Kant. (shrink)

What does imagination do for our perception of the world? Why should reality be broken off from our imagining of it? It was not always thus, and in these essays, Tim Ingold sets out to heal the break between reality and imagination at the heart of modern thought and science. Imagining for Real joins with a lifeworld ever in creation, attending to its formative processes, corresponding with the lives of its human and nonhuman inhabitants. Building on his two previous essay (...) collections, The Perception of the Environment and Being Alive, this book rounds off the extraordinary intellectual project of one of the world's most renowned anthropologists. Offering hope in troubled times, these essays speak to coming generations in a language that surpasses disciplinary divisions. They will be essential reading not only to for anthropologists but also for students in fields ranging from art, aesthetics, architecture and archaeology to philosophy, psychology, human geography, comparative literature and theology. (shrink)

Neural organoids are laboratory-generated entities that replicate certain structural and functional features of the human brain. Most neural organoids are disembodied—completely decoupled from sensory input and motor output. As such, questions about their potential capacity for consciousness are exceptionally difficult to answer. While not disputing the need for caution regarding certain neural organoid types, this paper appeals to two broad constraints on any adequate theory of consciousness—the first involving the dependence of consciousness on embodiment; the second involving the dependence of (...) consciousness on representations—to argue that disembodied neural organoids are not plausible candidates for consciousness. (shrink)

Hilary Putnam once suggested that “the actual existence of sets as ‘intangible objects’ suffers… from a generalization of a problem first pointed out by Paul Benacerraf… are sets a kind of function or are functions a sort of set?” Sadly, he did not elaborate; my aim, here, is to do so on his behalf. There are well-known methods for treating sets as functions and functions as sets. But these do not raise any obvious philosophical or foundational puzzles. For that, we (...) first need to provide a full-fledged function theory. I supply such a theory: it axiomatizes the iterative notion of function in exactly the same sense that ZF axiomatizes the iterative notion of set. Indeed, this function theory is synonymous with ZF. It might seem that set theory and function theory present us with rival foundations for mathematics, since they postulate different ontologies. But appearances are deceptive. Set theory and function theory provide the very same judicial foundation for mathematics. They do not supply rival metaphysical foundations; indeed, if they supply metaphysical foundations at all, then they supply the very same metaphysical foundations. (shrink)

Philosophy is witnessing an “Agential Turn,” characterised by the thought that explaining certain distinctive features of human mentality requires conceiving of many mental phenomena as acts, and of subjects as their agents. We raise a challenge for three central explanatory appeals to mental agency––agentialism about doxastic responsibility, agentialism about doxastic self‐knowledge, and an agentialist explanation of the delusion of thought insertion: agentialists either commit themselves to implausibly strong claims about the kind of agency involved in the relevant phenomena, or make (...) appeals to agency which seem explanatorily redundant. The agentialist literature does not contain a clear answer to this Agentialist Dilemma, and we put it forward here as a core challenge for the Agential Turn. But we also accept the fundamental motivation behind the Agential Turn, its critique and rejection of a purely passivist and spectatorial conception of the human mind. We close by urging the recognition of a broader category of rational subjectivity, a category which includes states which are neither active nor passive, but nevertheless form part of a subject's rational point of view on the world. (shrink)

Philosophy is witnessing an “Agential Turn,” characterised by the thought that explaining certain distinctive features of human mentality requires conceiving of many mental phenomena as acts, and of subjects as their agents. We raise a challenge for three central explanatory appeals to mental agency––agentialism about doxastic responsibility, agentialism about doxastic self‐knowledge, and an agentialist explanation of the delusion of thought insertion: agentialists either commit themselves to implausibly strong claims about the kind of agency involved in the relevant phenomena, or make (...) appeals to agency which seem explanatorily redundant. The agentialist literature does not contain a clear answer to this Agentialist Dilemma, and we put it forward here as a core challenge for the Agential Turn. But we also accept the fundamental motivation behind the Agential Turn, its critique and rejection of a purely passivist and spectatorial conception of the human mind. We close by urging the recognition of a broader category of rational subjectivity, a category which includes states which are neither active nor passive, but nevertheless form part of a subject's rational point of view on the world. (shrink)

Against transmission -- For attention -- Education in the minor key -- Anthropology, art and the university.

What kind of technology is the piano? It was once a distinctly everyday technology. In the bourgeois home of the nineteenth century it became an emblematic figure of gendered social life, its role shifting between visually pleasing piece of furniture, source of light entertainment, and expression of cultured upbringing. It performed this role unobtrusively, acting as a transparent mediator of social relations. To the composer of concert music it was, and sometimes still is, says Samuel Wilson, like the philosopher’s table: (...) “an assumed background on which one writes.” Like other instruments standard to Western art music, the piano was designed to facilitate the production of a consistent and refined timbre. More than most other such instruments, the piano also facilitated a kind of sonic neutrality. With its wide pitch range and smoothing of the percussive attack of its predecessor instruments, the piano presented composers with a technological means of approaching composition from a seemingly objective vantage point. It exemplified, in Heideggerian terms, the instrumentality of the instrument, serving as a mediator between idea and expression that apparently adds no character of its own. -/- This notion of the invisibility, or transparency, of the mediations that musical technologies such as the piano enact is one of my areas of concern here. So too is its inverse: when these mediations become visible or opaque. Transparency has been a topic of significant recent theoretical attention. Stefanos Geroulanos, for example, has detailed how the supposed transparency of intersubjective, epistemological, and social relations was a major point of critique in postwar French thought, where the supposition of transparency was taken to suppress how the world was “complex, layered, structured, filled with heterogeneity” – and, as I will stress here, contingency. The thinkers Geroulanos considers, from Jean-Paul Sartre through to Jean-François Lyotard, can be said to be united in their refusal to invisibilise mediatedness. From a starting point of conceiving of the piano as a technological artifact, and in particular from John Cage’s ‘prepared piano,’ I will explore how a similar concern has appeared in musical contexts, albeit not without the risk of reversion back into a logic of transparency. (shrink)

Philosophy is witnessing an ‘Agential Turn’, characterised by the thought that explaining certain distinctive features of human mentality requires conceiving of many mental phenomena as acts, and of subjects as their agents. We raise a challenge for three central explanatory appeals to mental agency – agentialism about doxastic responsibility, agentialism about doxastic self-knowledge, and an agentialist explanation of the delusion of thought insertion: agentialists either commit themselves to implausibly strong claims about the kind of agency involved in the relevant phenomena, (...) or make appeals to agency which seem explanatorily redundant. The agentialist literature does not contain a clear answer to this Agentialist Dilemma, and we put it forward here as a core challenge for the Agential Turn. But we also accept the fundamental motivation behind the Agential Turn, its critique and rejection of a purely passivist and spectatorial conception of the human mind. We close by urging the recognition of a broader category of rational subjectivity, a category which includes states which are neither active nor passive, but nevertheless form part of a subject’s rational point of view on the world. (shrink)

Workplace AI is transforming labor but decisions on which AI applications are developed or implemented are made with little to no input from workers themselves. In this piece for AI & Society, I argue for nationalization as a strategy for democratizing AI.

Like those famous nations divided by a single tongue, my paper (this volume) and Professor P.M. Churchland's deep and engaging reply offer different spins on a common heritage. The common heritage is, of course, a connectionist vision of the inner neural economy- a vision which depicts that economy in terms of supra-sentential state spaces, vector-to-vector transformations, and the kinds of skillful pattern-recognition routine we share with the bulk of terrestrial intelligent life-forms. That which divides us is, as ever, much harder (...) to isolate and name. Clearly, it has something to do with the role of moral talk and exchange, and something to do with the conception of morality itself (and, correlatively, with the conception of moral progress). Most of this Reply will be devoted to clarifying the nature of the disputed territory. First, though (as a prophylactic against misunderstanding) I shall rehearse some points of agreement concerning moral talk and progress. (shrink)

In what follows I offer some reflections on an ethics of listening, or perhaps more generally a philosophy of listening, that can be discerned in different forms in the experimental music that, since the 1950s, has challenged and radicalised how music is understood. I situate these reflections around three of my own concert experiences as an audience member.

Adventures in cutting-edge ideas about consciousness, from bestselling non-fiction writer Tim Parks. Hardly a day goes by without some discussion about whether computers can be conscious, whether our universe is some kind of simulation, whether mind is a unique quality of human beings or spread out across the universe like butter on bread. Most philosophers believe that our experience is locked inside our skulls, an unreliable representation of a quite different reality outside. Colour, smell and sound, they tell us, occur (...) only in our heads. Yet when neuroscientists look inside our brains to see what's going on, they find only billions of neurons exchanging electrical impulses and releasing chemical substances. Five years ago, in a chance conversation, Tim Parks came across a radical new theory of consciousness that undercut this interpretation. This set him off on a quest to discover more about this fascinating topic and also led him to observe his own experience with immense attention. Out of My Head tells the gripping, highly personal, often surprisingly funny, story of Tim Parks' quest to discover more about this fascinating topic. It frames complex metaphysical considerations and technical laboratory experiments in terms we can all understand. Above all, it invites us to see space, time, colour and smell, sounds and sensations in an entirely new way. The world will feel more real after reading it. (shrink)

It is common to distinguish between conscious mental episodes and standing mental states — those mental features like beliefs, desires or intentions, which a subject can have even if she is not conscious, or when her consciousness is occupied with something else. This paper presents a view of standing mental states according to which these states are less real than episodes of consciousness. It starts from the usual view that states like beliefs and desires are not directly present to the (...) mind, but are posited to explain thought and behaviour. Ascriptions of these states are attempts to model a subject’s “Worldview”: the totality of their cognitive, conative and affective dispositions. When ascribing standing states, we often significantly simplify the complexity of the Worldview. This simplification is a feature of models in general. The Worldview is also distinguished from the “Habitus” — the totality of dispositions that are associated with character traits. As with the Worldview, modelling the Habitus should be treated as a useful simplification of a very complex reality. It is argued that although these models have some similarities with fictions, these similarities are outweighed by the dissimilarities. (shrink)

This essay explores the relationship between boredom, leisure, selfhood, and education in Kevin Hood Gary’s book, Why Boredom Matters, paying particular attention to connections between Aristotelian and existentialist approaches to the subject. Following Gary, the essay argues that schools force students to endure boredom or try to stimulate them with distractions, rather than helping them focus on enduring sources of meaning or cultivate stronger senses of self.

William James has long been recognized as a central figure in the American philosophic tradition, and his ideas continue to play a significant role in contemporary thinking. Yet there has never been a comprehensive exploration of the thought of this seminal philosopher and psychologist. In Experiencing William James, renowned scholar James Campbell provides the fuller and more complete analysis that James scholarship has long needed. Commentators typically address only pieces of James's thought or aspects of his vision, often in (...) an attempt to make the task of understanding James seem easier than it is or else to dismiss him as a philosophically unprepared if well-meaning amateur. The isolated nature of these examinations, too often divorced from the original contexts, badly hinders and even distorts their conclusions. Focusing on James's own ideas rather than his critiques of others, and drawing from a wealth of scholarship that includes the completed editions of his writings and correspondence, Experiencing William James provides an invaluable, comprehensive view of James as he participates in and advances the pragmatic spirit that is at the core of American philosophy. Taking the whole of the man's thinking into account, this book offers the richest perspective so far on this great but not fully comprehended intellectual. (shrink)

The Meno is one of the foundational dialogues of the Platonic tradition - it initiates a series of investigations into subjects which lie at the heart of philosophy: What is virtue? How is it acquired?This edition of Taylor's revision of Sydenham's translation adds three introductory essays by Tim Addley and an extract from Procclus' commentary on The Republic on Virtue.