This volume brings together mostly previously unpublished studies by prominent historians, classicists, and philosophers on the roles and effects of religion in Socratic philosophy and on the trial of Socrates. Among the contributors are Thomas C. Brickhouse, Asli Gocer, Richard Kraut, Mark L. McPherran, Robert C. T. Parker, C. D. C. Reeve, Nicholas D. Smith, Gregory Vlastos, Stephen A. White, and Paul B. Woodruff.

Introduction: the age of reflexion Part I. Romanticism: 1. Romanticism and the sciences David Knight 2. Schelling and the origins of his Naturphilosophie S. R. Morgan 3. Romantic philosophy and the organization of the disciplines: the founding of the Humboldt University of Berlin Elinor S. Shaffer 4. Historical consciousness in the German Romantic Naturforschung Dietrich Von Engelhardt 5. Theology and the sciences in the German Romantic period Frederick Gregory 6. Genius in Romantic natural philosophy Simon Shaffer Part II. Sciences of (...) the Organic: 7. Doctors contra clysters and feudalism: the consequences of a Romantic revolution Nelly Tsouyopoulos 8. Morphotypes and the historical-genetic method in Romantic biology Timothy Lenoir 9. ’Metaphorical mystifications’: the Romantic gestation of nature in British biology Evelleen Richards 10. Transcendental anatomy Philip F. Rehbock 11. Romantic thought and the origins of cell theory L. S. Jacyna 12. Alexander von Humbolt and the geography of vegetation Malcolm Nicholson Part III. Sciences of the Inorganic: 13. Goethe, colour, and the science of seeing Dennis L. Sepper 14. Johann Wilhelm Ritter: Romantic physics in Germany Walter D. Wetzels 15. The power and the glory: Humphrey Davy and Romanticism Christopher Lawrence 16. Oersted’s discovery of electromagnetism H. A. M. Snelders 17. Caves, fossils and the history of the earth Nicholas A. Rupke Part IV. Literature and the Sciences: 18. Goethe’s use of chemical theory in his Elective Affinities Jeremy Adler 19. Kleist’s bedlam: abnormal psychology and psychiatry in the works of Heinrich von Kleist Nigel Reeves 20. Coleridge and the sciences Trevor H. Levere 21. Nature’s book: the language of science in the American Renaissance David van Leer 22. The shattered whole: Georg Buchner and Naturphilosophie John Reddick. (shrink)

Talk of linguistic universals has given cognitive scientists the impression that languages are all built to a common pattern. In fact, there are vanishingly few universals of language in the direct sense that all languages exhibit them. Instead, diversity can be found at almost every level of linguistic organization. This fundamentally changes the object of enquiry from a cognitive science perspective. This target article summarizes decades of cross-linguistic work by typologists and descriptive linguists, showing just how few and unprofound the (...) universal characteristics of language are, once we honestly confront the diversity offered to us by the world's 6,000 to 8,000 languages. After surveying the various uses of “universal,” we illustrate the ways languages vary radically in sound, meaning, and syntactic organization, and then we examine in more detail the core grammatical machinery of recursion, constituency, and grammatical relations. Although there are significant recurrent patterns in organization, these are better explained as stable engineering solutions satisfying multiple design constraints, reflecting both cultural-historical factors and the constraints of human cognition.Linguistic diversity then becomes the crucial datum for cognitive science: we are the only species with a communication system that is fundamentally variable at all levels. Recognizing the true extent of structural diversity in human language opens up exciting new research directions for cognitive scientists, offering thousands of different natural experiments given by different languages, with new opportunities for dialogue with biological paradigms concerned with change and diversity, and confronting us with the extraordinary plasticity of the highest human skills. (shrink)

This book is a general introduction to the philosophy of John Locke, one of the most influential thinkers in modern times. Nicholas Jolley aims to show the fundamental unity of Locke's thought in his masterpiece, the Essay Concerning Human Understanding. In this work Locke advances a coherent theory of knowledge; as against Descartes he argues that knowledge is possible to the extent that it concerns essences which are constructions of the human mind.

Nicholas Agar offers a more nuanced view of the transformative potential of genetic and cybernetic technologies, making a case for moderate human enhancement—improvements to attributes and abilities that do not significantly exceed what ...

Proposals to make us smarter than the greatest geniuses or to add thousands of years to our life spans seem fit only for the spam folder or trash can. And yet this is what contemporary advocates of radical enhancement offer in all seriousness. They present a variety of technologies and therapies that will expand our capacities far beyond what is currently possible for human beings. In _Humanity's End,_ Nicholas Agar argues against radical enhancement, describing its destructive consequences. Agar examines (...) the proposals of four prominent radical enhancers: Ray Kurzweil, who argues that technology will enable our escape from human biology; Aubrey de Grey, who calls for anti-aging therapies that will achieve "longevity escape velocity"; Nick Bostrom, who defends the morality and rationality of enhancement; and James Hughes, who envisions a harmonious democracy of the enhanced and the unenhanced. Agar argues that the outcomes of radical enhancement could be darker than the rosy futures described by these thinkers. The most dramatic means of enhancing our cognitive powers could in fact kill us; the radical extension of our life span could eliminate experiences of great value from our lives; and a situation in which some humans are radically enhanced and others are not could lead to tyranny of posthumans over humans. (shrink)

In this provocative book, philosopher Nicholas Agar defends the idea that parents should be allowed to enhance their children’s characteristics. Gets away from fears of a Huxleyan ‘Brave New World’ or a return to the fascist eugenics of the past Written from a philosophically and scientifically informed point of view Considers real contemporary cases of parents choosing what kind of child to have Uses ‘moral images’ as a way to get readers with no background in philosophy to think about (...) moral dilemmas Provides an authoritative account of the science involved, making the book suitable for readers with no knowledge of genetics Creates a moral framework for assessing all new technologies. (shrink)

In this provocative book, philosopher Nicholas Agar defends the idea that parents should be allowed to enhance their children’s characteristics. Gets away from fears of a Huxleyan ‘Brave New World’ or a return to the fascist eugenics of the past Written from a philosophically and scientifically informed point of view Considers real contemporary cases of parents choosing what kind of child to have Uses ‘moral images’ as a way to get readers with no background in philosophy to think about (...) moral dilemmas Provides an authoritative account of the science involved, making the book suitable for readers with no knowledge of genetics Creates a moral framework for assessing all new technologies. (shrink)

Proposals to make us smarter than the greatest geniuses or to add thousands of years to our life spans seem fit only for the spam folder or trash can. And yet this is what contemporary advocates of radical enhancement offer in all seriousness. They present a variety of technologies and therapies that will expand our capacities far beyond what is currently possible for human beings. In _Humanity's End,_ Nicholas Agar argues against radical enhancement, describing its destructive consequences. Agar examines (...) the proposals of four prominent radical enhancers: Ray Kurzweil, who argues that technology will enable our escape from human biology; Aubrey de Grey, who calls for anti-aging therapies that will achieve "longevity escape velocity"; Nick Bostrom, who defends the morality and rationality of enhancement; and James Hughes, who envisions a harmonious democracy of the enhanced and the unenhanced. Agar argues that the outcomes of radical enhancement could be darker than the rosy futures described by these thinkers. The most dramatic means of enhancing our cognitive powers could in fact kill us; the radical extension of our life span could eliminate experiences of great value from our lives; and a situation in which some humans are radically enhanced and others are not could lead to tyranny of posthumans over humans. (shrink)

Accounts of video game play developed from an ethnomethodological and conversation analytic perspective remain relatively scarce. This study collects together an emerging, if scattered, body of research which focuses on the material, practical “work” of video game players. The study offers an example-driven explication of an EMCA perspective on video game play phenomena. The materials are arranged as a “tactical zoom.” We start very much “outside” the game, beginning with a wide view of how massive-multiplayer online games are played within (...) dedicated gaming spaces; here, we find multiple players, machines, and many different sorts of activities going on. Still remaining somewhat distanced from the play of the game itself, we then take a closer look at the players themselves by examining a notionally simpler setting involving pairs taking part in a football game at a games console. As we draw closer to the technical details of play, we narrow our focus further still to examine a player and spectator situated “at the screen” but jointly analyzing play as the player competes in an online first-person shooter. Finally, we go “inside” the game entirely and look at the conduct of avatars on-screen via screen recordings of a massively multiplayer online game. Having worked through specific examples, we provide an elaboration of a selection of core topics of ethnomethodology and conversation analysis that is used to situate some of the unstated orientations in the presentation of data fragments. In this way, recurrent issues raised in the fragments are shown as coherent, interconnected phenomena. In closing, we suggest caution regarding the way game play phenomena have been analyzed in this study, while remarking on challenges present for the development of further EMCA-oriented research on video game play. (shrink)

Michael Smith’s moral problem is not about whether to betray one’s friends or one’s country. It is a metaethical problem about how to combine three tempting theses that look mutually inconsistent: moral cognitivism, appraiser internalism about moral judgments and motivation, and a “Humean” account of motivation. In Smith’s formulation, these become: 1. Moral judgements of the form, ‘It is right that I φ’ express a subject’s belief about an objective matter of fact, a fact about what it is right for (...) her to do. 2. [Necessarily] if someone judges that it is right that she φs, then, ceteris paribus, she is motivated to φ. 3. An agent is motivated to act in a certain way just in case she has an appropriate desire and a means-end belief, where belief and desire are, in Hume’s terms, distinct existences. As he notes, many metaethical positions can be classified by the way they seek to escape this apparent inconsistency: noncognitivists deny 1 to preserve 2 and 3, some ethical naturalists deny 2 to save 1 and 3, and some internalist cognitivists deny 3 and keep 1 and 2. Smith devotes a chapter to each of these responses and then defends his own view, which retains all three claims in a position advertised as not only consistent but realist, internalist, and, in a broad sense, naturalist. (shrink)

Is there a duty to prosecute grave international crimes? Many have thought so, even if they recognize the obligation to be defeasible. However, the theoretical literature frequently leaves the grounds for such a duty inadequately specified, or unsystematically amalgamated, leaving it unclear which considerations should drive and shape processes of criminal accountability. Further, the circumstance leaves calls to end impunity vulnerable to skeptical worries concerning the risks and costs of punishing perpetrators. I argue that a qualified duty to prosecute can (...) be substantiated on the basis of a single class of reasons, though also that standard justifications of international criminal law (as currently conceived) are not up to the task. The account exploits the expressive dimension of punishment, but locates the central good of criminal accountability in its capacity to appropriately enable an agential stance on the part of subjects in transitional circumstances. It can legitimate, in a way to be specified, hope. The approach also displays the cynicism of an anti‐impunity ethos in the absence of a robust commitment to securing basic human rights in transitional circumstances. (shrink)

This article develops and defends a triadic account of structural domination, according to which structural domination (e.g. patriarchy, white supremacy, capitalism) is a triadic relation between dominator(s), dominated, and regulator(s)—the constitutive domination dyad plus those roles and norms expressively upholding it. The article elaborates on the relationship between structure and agency from the perspective of both oppressor and oppressed and discusses the deduction of the concept of the capitalist state from the concept of capitalism. On the basis of these definitions, (...) it shows that structural domination under capitalism presupposes collective power but no joint agency or shared intentions on the part of the dominators. (shrink)

I argue that S knows that p implies that S is properly committed to the truth of p, not that S believes that p. Belief is not required for knowledge because it is possible that one could know that there are no beliefs. Being ‘properly committed’ to the truth of a proposition is a matter of having a certain normative status, not occupying a particular psychological state. After arguing that knowledge requires commitment instead of belief, I go on to demonstrate (...) the theoretical utility of this hypothesis. (shrink)

This article investigates and resolves the question whether gauge symmetry can display analogs of the famous Galileo’s ship scenario. In doing so, it builds on and clarifies the work of Greaves and Wallace on this subject.

Journal of Social Philosophy, EarlyView.

Nietzsche's Ecce Homo was published posthumously in 1908, eight years after his death, and has been variously described ever since as useless, mad, or merely inscrutable. Against this backdrop, Nicholas D. More provides the first complete and compelling analysis of the work, and argues that this so-called autobiography is instead a satire. This form enables Nietzsche to belittle bad philosophy by comic means, attempt reconciliation with his painful past, review and unify his disparate works, insulate himself with humor from (...) the danger of 'looking into abysses', and establish wisdom as a special kind of 'good taste'. After showing how to read this much-maligned book, More argues that Ecce Homo presents the best example of Nietzsche making sense of his own intellectual life, and that its unique and complex parody of traditional philosophy makes a powerful case for reading Nietzsche as a philosophical satirist across his corpus. (shrink)

"A complete and unified account of Plato's epistemology... scholarly, historically sensitive, and philosophically sophisticated. Above all it is sensible.... White's strength is that he places Plato's preoccupation in careful historical perspective, without belittling the intrinsic difficulties of the problems he tackled.... White's project is to find a continuous argument running through Plato's various attacks on epistemological problems. No summary can do justice to his remarkable success." --Ronald B. De Sousa, University of Toronto, in Phoenix.

A step by step, passage by passage analysis of the complete Republic. White shows how the argument of the book is articulated, the important interconnections among its elements, and the coherent and carefully developed train of though which motivates its complex philosophical reasoning. In his extensive introduction, White describes Plato's aims, introduces the argument, and discusses the major philosophical and ethical theories embodied in the Republic. He then summarizes each of its ten books and provides substantial explanatory and interpretive notes.

This paper explores cultural understandings of virtual sexual ageplay in the online world of Second Life. Online sexual ageplay is the virtual simulation of child abuse by consensual adults operating in-world with child computer characters. Second Life is primarily governed by Community Standards which rely on residents to recognise sexual ageplay and report it, which requires an appreciation of how residents view, understand and construct sexual ageplay. The research presented drew on 12 months of resident blog posts referring to sexual (...) ageplay: 263 total, with 91 residents. The analysis of this talk explores the cultural understandings of this banned behaviour and beliefs about the nature of Second Life which underpin residents’ likelihood to report sexual ageplay and so comply with the Community Standards. In considering these issues the paper is able to highlight issues regarding the unique cultural position of abuse against children and key concerns which underpin the reporting behaviour of residents. Key considerations relate to defining online sexual activity and child avatars; the moral status of ‘reporters’, and sexual ageplay as a form of edgeplay; belief in the harmfulness of sexual ageplay and its relationship to real world behaviours. (shrink)

Here, I combine the semantics of Mares and Goldblatt [20] and Seki [29, 30] to develop a semantics for quantified modal relevant logics extending ${\bf B}$. The combination requires demonstrating that the Mares–Goldblatt approach is apt for quantified extensions of ${\bf B}$ and other relevant logics, but no significant bridging principles are needed. The result is a single semantic approach for quantified modal relevant logics. Within this framework, I discuss the requirements a quantified modal relevant logic must satisfy to be (...) “sufficiently classical” in its modal fragment, where frame conditions are given that work for positive fragments of logics. The roles of the Barcan formula and its converse are also investigated. (shrink)

This article uncovers a foundational relationship between the ‘gauge symmetry’ of a Newton-Cartan theory and the celebrated Trautman Recovery Theorem and explores its implications for recent philosophical work on Newton-Cartan gravitation.

But that which remains the poets have founded.In contemporary rhetorical theory, the relationship between rhetoric and art tends to be articulated in terms of aesthetics. This increasingly popular discourse on “aesthetic rhetoric,” however, is characterized by a remarkable diversity. The rhetoric of fiction, poetry, and other literary genres, for example, has been explored in these terms (e.g., Booth 1983), as has the rhetoric of film (Haskins 2003), photography (Hariman and Lucaites 2007), and even natural landscapes (Clark 2004). From a different (...) perspective, aesthetics has been distilled to a range of “features” or “elements” that a given text is said to possess. Nathan Crick and Jeremy Engels, for example .. (shrink)

In debates over the regulation of communication related to dual-use research, the risks that such communication creates must be weighed against against the value of scientific autonomy. The censorship of such communication seems justifiable in certain cases, given the potentially catastrophic applications of some dual-use research. This conclusion however, gives rise to another kind of danger: that regulators will use overly simplistic cost-benefit analysis to rationalize excessive regulation of scientific research. In response to this, we show how institutional design principles (...) and normative frameworks from free speech theory can be used to help extend the argument for regulating dangerous dual-use research beyond overly simplistic cost-benefit reasoning, but without reverting to an implausibly absolutist view of scientific autonomy. (shrink)

Gottfried Wilhelm Leibniz (1646-1716) was hailed by Bertrand Russell as "one of the supreme intellects of all time." A towering figure in Seventeenth century philosophy, his complex thought has been championed and satirized in equal measure, most famously in Voltaire's Candide. In this outstanding introduction to his philosophy, Nicholas Jolley introduces and assesses the whole of Leibniz's philosophy. Beginning with an introduction to Leibniz's life and work, he carefully introduces the core elements of Leibniz's metaphysics: his theories of substance, (...) identity and individuation; monads and space and time; and his important debate over the nature of space and time with Newton's champion, Samuel Clarke. He then introduces Leibniz's theories of mind, knowledge, and innate ideas, showing how Lenin anticipated the distinction between conscious and unconscious states, before examining his theory of free will and the problem of evil. An important feature of the book is its introduction to Leibniz'smoral and political philosophy, an overlooked aspect of his work. The final chapter assesses legacy and the impact of his philosophy on philosophy as a whole, particularly on the work of Immanuel Kant. Throughout, Nicholas Jolley places Lenin in relation to some of the other great philosophers, such as Descartes, Spinoza and Locke, and discusses Leibniz's key works, such as the Monadology and Discourse on Metaphysics. (shrink)

To be committed to the truth of a proposition is to constrain one’s options in a certain way: one may not reason as if it is false, and one is obligated to reason as if it is true. Though one is often committed to the truth of the propositions that one believes, the states of belief and commitment are distinct. For historical reasons, however, they are rarely distinguished. Distinguishing between the two states allows for a defense of epistemic deontology against (...) the charge that beliefs are not under the voluntary control of believers, and so cannot be subject to deontic evaluation. It also allows for the resolution of some disputes between naturalists and non-naturalists in epistemology, and permits us to account for obvious facts about the connection between belief and truth in a theoretically parsimonious way. (shrink)

Are bacteriophage T4 and the long-nosed elephant fish valuable in their own right? Nicholas Agar defends an affirmative answer to this question by arguing that anything living is intrinsically valuable. This claim challenges received ethical wisdom according to which only human beings are valuable in themselves. The resulting biocentric or life-centered morality forms the platform for an ethic of the environment. -/- Agar builds a bridge between the biological sciences and what he calls "folk" morality to arrive at a (...) workable environmental ethic and a new spectrum--a new hierarchy--of living organisms. The book overturns common-sense moral belief as well as centuries of philosophical speculation on the exclusive moral significance of humans. Spanning several fields, including philosophy of psychology, philosophy of science, and other areas of contemporary analytic philosophy, Agar analyzes and speaks to a wide array of historic and contemporary views, from Aristotle and Kant, to E. O. Wilson, Holmes Rolston II, and Baird Callicot. The result is a challenge to prevailing definitions of value and a call for a scientifically-informed appreciation of nature. (shrink)

In this paper, we highlight some problems for accounts of disability and enhancement that have not been sufficiently addressed in the literature. The reason, we contend, is that contemporary debates that seek to define, characterise or explain the normative valence of disability and enhancement do not pay sufficient attention to a wide range of cases, and the transition between one state and another. In section one, we provide seven cases that might count as disability or enhancement. We explain why each (...) case might count, and on what basis, and why it is been neglected. Each case is explained as a transition in what we call capacity space. We then argue that no definition of disability or enhancement addresses all of these cases, except for strict welfarist accounts of disability that do not rely on a depiction of any particular capacity. We argue further, however, that this is a serious deficiency of welfarist conceptions of disability. We then address objections to our account. (shrink)

A recent controversy over the US National Science Advisory Board for Biosecurity's recommendation to censor two publications on genetically modified H5N1 avian influenza has generated concern over the threat to scientific freedom such censorship presents. In this paper, I argue that in the case of these studies, appeals to scientific freedom are not sufficient to motivate a rejection of censorship. I then use this conclusion to draw broader concerns about the ethics of dual-use research.

In this superb introduction, Nicholas Dent covers the whole of Rousseau's thought. Beginning with a helpful overview of Rousseau's life and works, he introduces and assesses Rousseau's central ideas and arguments. These include the corruption of modern civilization, the state of nature, his famous theories of _amour de soi _and _amour propre_, education, and his famous work _Emile_. He gives particular attention to Rousseau's theories of democracy and freedom found in his most celebrated work, _The Social Contract_, and explains (...) what Rousseau meant by the 'general will'. (shrink)

Political exclusion on grounds of incapacity is the primary remaining source of exclusion from the franchise. It is appealed to by states and theorists alike to justify excluding young people and many people with cognitive disability from the franchise. Defenders of this exclusion claim that no wrong is done by this exclusion and that states gain some significant benefits from this restricting of the franchise. I have argued elsewhere that political exclusion as currently practiced in modern liberal democratic states in (...) fact causes significant harms, as it excludes some people who have the relevant capacity for political participation. Here, I argue that the exclusion of incapable actors prevents no significant harms to democratic outcomes, and that it confers no significant democratic benefits on the states practising this exclusion. As such, I argue that we ought to heavily modify and perhaps even abandon the capacity standard for political inclusion. (shrink)

This is the first modern interpretation of Leibniz's comprehensive critique of Locke, the New Essays on Human Understanding. Arguing that the New Essays is controlled by the overriding purpose of refuting Locke's alleged materialism, Jolley establishes the metaphysical and theological motivation of the work on the basis of unpublished correspondence and manuscript material. He also shows the relevance of Leibniz's views to contemporary debates over innate ideas, personal identity, and natural kinds.

Focusing on God's essential attributes of omnipotence, omniscience, being eternal and omnipresent, being a creator and sustainer, and being a person, I examine how far recent discussion has been able to provide for each of these divine attributes a consistent interpretation. I also consider briefly whether the attributes are compatible with each other.

How does morality allocate responsibility for what it requires? I am concerned here with one fundamental part of this question, namely, how morality determines responsibility when multiple agents are capable of contributing to or completing a moral task, and special relationships capable of generating duties with respect to the task are non-existent, insufficient as a moral response, or partly indeterminate. On one view, responsibility falls to the agents who can bear it with the least burden. I show why this is (...) initially attractive and mistaken. Instead, I defend an equity-based approach that accommodates the intuitions that both support and trouble the least-cost principle. One upshot is that sometimes we ought prefer a distribution of responsibility that is more expensive and less local than needed to complete the task. I illustrate the practical significance of the argument in terms of the human rights of refugees. (shrink)

In a recent paper in this journal, Richard Arneson criticizes the domination account of exploitation and attributes it to me and Allen Wood. In this paper, I defend the domination account against Arneson's criticisms. I begin by showing that the domination view is distinct from the vulnerability-based view defended by Wood. I also show that Alan Wertheimer's influential account of exploitation is congenial to the domination view. I then argue that Arneson's own fairness-based view of exploitation generates false negatives and (...) trivializes the concept of exploitation, rendering it entirely parasitic on the notion of unfairness. (shrink)

The rapid developments in technologies -- especially computing and the advent of many 'smart' devices, as well as rapid and perpetual communication via the Internet -- has led to a frequently voiced view which Nicholas Agar describes as 'radical optimism'. Radical optimists claim that accelerating technical progress will soon end poverty, disease, and ignorance, and improve our happiness and well-being. Agar disputes the claim that technological progress will automatically produce great improvements in subjective well-being. He argues that radical optimism (...) 'assigns to technological progress an undeserved pre-eminence among all the goals pursued by our civilization'. Instead, Agar uses the most recent psychological studies about human perceptions of well-being to create a realistic model of the impact technology will have. Although he accepts that technological advance does produce benefits, he insists that these are significantly less than those proposed by the radical optimists, and aspects of such progress can also pose a threat to values such as social justice and our relationship with nature, while problems such as poverty cannot be understood in technological terms. He concludes by arguing that a more realistic assessment of the benefits that technological advance can bring will allow us to better manage its risks in future. (shrink)

In the Aristotelian tradition, there are two broad answers to the basic question "What is soul?" On the one hand, the soul can be described by what it does. From this perspective, the soul seems to be composed of various different parts or powers (potentiae) that are the principles of its various actions. On the other hand, the soul seems to be something different, namely, the actual formal principle making embodied living substances to be the kinds of things that they (...) are. Contemporary Aristotelians are split on how to interpret Aristotle: Anna Marmodoro (2013, 18), Thomas Johansen (2012, 81), and most others argue that the soul is nothing but a kind of cluster or group of powers. Rebekah Johnston (2011), however, strongly disagrees and argues that the soul is only the actual principle of embodied substance. Aquinas provides a novel and neglected solution to this problem and would argue that both sides are partly right but that either side is insufficient without the other. (shrink)

Humans have a much longer juvenile period (weaning to first reproduction, 14 or more years) than their closest relatives (chimpanzees, 8 years). Three explanations are prominent in the literature. (a) Humans need the extra time to learn their complex subsistence techniques. (b) Among mammals, since length of the juvenile period bears a constant relationship to adult lifespan, the human juvenile period is just as expected. We therefore only need to explain the elongated adult lifespan, which can be explained by the (...) opportunity for older individuals to increase their fitness by providing for grandchildren. (c) The recent model by Kaplan and colleagues suggests that longevity and investment in "embodied capital" will coevolve, and that the need to learn subsistence technology contributed to selection for our extended lifespan.We report experiments designed to test the first explanation: human subsistence technology takes many years to learn, and spending more time learning it gives reproductive benefits that outweight lost time. Taking away some of this time should lead to deficits in efficiency. We paid Hadza foragers to participate in tests of important subsistence skills. We compared efficiency of males and females at digging tubers. They differ greatly in time spent practicing digging but show no difference in efficiency. Children who lost "bush experience" by spending years in boarding school performed no worse at digging tubers or target archery than those who had spent their entire lives in the bush. Climbing baobab trees, an important and dangerous skill, showed no change with age among those who attempted it. We could show no effects of practice time.These findings do not support what we label "the practice theory," but we discuss ways in which the theory could be defended; for example, some as-yet-untested skill may be greatly impaired by loss of a few years of the juvenile period. Our data also show that it is not safe to assume that increases in skill with age are entirely due to learning or practice; they may instead be due to increases in size and strength. (shrink)

The experience of having to suffer debilitating pain is far too common in the United States, and many patients continue to be inadequately treated by their doctors. Although many physicians freely admit that their pain management practices may have been somewhat lacking, many more express concern that the prescribing of heightened levels of opioid analgesics may result in closer regulatory scrutiny, criminal investigation, or even criminal prosecution.Although several researchers have examined the regulatory environment and the threat of sanction or harm (...) it poses to physicians and patients, few have examined the likelihood of investigation or prosecution stemming from the aggressive use of opioids in physician-directed pain management. Accordingly, in an effort to assess whether the fear of prosecution is realistic and, if so, what factors contribute to its likelihood, we surveyed chief prosecutors in four states about their knowledge, opinions, and attitudes concerning opioids and the prosecution of physicians stemming from the treatment of patients who were either terminally ill or suffering from chronic noncancer pain. (shrink)