The _Physics_ is a foundational work of western philosophy, and the crucial one for understanding Aristotle's views on matter, form, essence, causation, movement, space, and time. This richly annotated, scrupulously accurate, and consistent translation makes it available to a contemporary English reader as no other does—in part because it fits together seamlessly with other closely associated works in the New Hackett Aristotle series, such as the _Metaphysics_, _De Anima_, and forthcoming _De Caelo_ and _On Coming to Be and Passing Away_. (...) Eventually the series will include all of Aristotle's works. Sequentially numbered endnotes provide the information most needed at each juncture, while a detailed Index of Terms indicates places where focused discussion of key notions occurs. An illuminating general Introduction describes the book that lies ahead, explaining what sort of work it is and what sorts of evidence it relies on. (shrink)

Are the properties of communicative acts grounded in the intentions with which they are performed, or in the conventions that govern them? The latest round in this debate has been sparked by Ernie Lepore and Matthew Stone (2015), who argue that much more of communication is conventional than we thought, and that the rest isn’t really communication after all, but merely the initiation of open-ended imaginative thought. I argue that although Lepore and Stone may be right about many of the (...) specific cases they discuss, their big-picture, conventionalist conclusions don’t follow. My argument focuses on four phenomena that present challenges to conventionalist accounts of communication: ambiguity, indirect communication, communication by wholly unconventional means, and convention acquisition. (shrink)

In a landmark essay, Andreas Matthias claimed that current developments in autonomous, artificially intelligent (AI) systems are creating a so-called responsibility gap, which is allegedly ever-widening and stands to undermine both the moral and legal frameworks of our society. But how severe is the threat posed by emerging technologies? In fact, a great number of authors have indicated that the fear is thoroughly instilled. The most pessimistic are calling for a drastic scaling-back or complete moratorium on AI systems, while the (...) optimists aim to show that the gap can be bridged nonetheless. Contrary to both camps, I argue against the prevailing assumption that there is a technology-based responsibility gap. I show how moral responsibility is a dynamic and flexible process, one that can effectively encompass emerging technological entities. (shrink)

"A compelling, insightful, and intimate portrait of William James as artist, philosopher, and psychologist, The Compromised Scientist explains James's emergence as a founding father of American experimental psychology. Unlike most books about James, this one emphasizes the fact that he had found a career as a painter and was not really a "buried" philosopher or psychologist. He was, in fact, an artist who was forced to compromise his urge to paint by developing a unique psychological language--the language of the "stream (...) of consciousness." Daniel W. Bjork offers an entirely new perspective on James by analyzing his famous diary as a record of his brilliant flight from art to psychology. In addition, Bjork explores the ways in which James's artistic orientation inevitably brought him into conflict with such other major psychological pioneers as Hugo Münsterberg, Edward Bradford Titchener, and James McKeen Cattell, all of whom dissented from James's psychological and professional outlook and, in particular, his enthusiastic crusade for the unconscious and psychic research. For them too, James was a "compromised scientist"--A man who had abandoned scientific standards. This indispensable study, complete with ample diary notations and illustrations, brings into new perspective the leading figure in American experimental psychology."--Provided by publisher. (shrink)

Digital twinning in medicine refers to the idea of simulating a person’s organs, muscles or perhaps their entire body, in order to arrive more effectively at accurate diagnoses, to make treatment recommendations that reflect chances of success and possible side-effects, and to better understand the long-term trajectory of an individual’s overall condition. Digital twins, in these ways, build on the recent movement toward personalised medicine,1 and they undoubtedly present us with exciting opportunities to advance our health. Of course, the opportunities (...) are accompanied by newfound challenges—a common refrain in discussions surrounding emerging technologies. In a recent article, Matthias Braun surveys numerous problems, including the precision of simulations, ownership and consent to the use of digital models, and issues of justice in assuring equitable access to novel medical systems.2 In particular, he places special emphasis on the notion of representation. According to Braun, proper representation naturally calls for correspondence—namely a precise model offering dynamic, real-time feedback as well as transparency, both for the patient and the practitioner, in terms of the data being employed. While technical challenges remain, these goals are quite clear and relatively uncontroversial. Where a host of questions arise, however, is in the discussion on the interaction between the represented persons and their simulations. Alongside questions regarding ownership of one’s digital twin, Braun raises the concern that ‘giving …. (shrink)

The Paradox of Prime Matter DANIEL W. GRAHAM TRADITIONAL INTERPRETATIONS OF Aristotle hold that he posited the existence of prime matter–a purely indeterminate substratum underlying all material composition and providing the ultimate potentiality for all material existence. A number of revisionary interpretations have appeared in the last thirty years which deny that Aristotle had a concept of prime matter, provoking an even larger number of vigorous defenses claiming that he did have the concept? The traditionalists are clearly in the (...) majority, but some obstacles stand in the way of a general acceptance of prime matter as an Aristotelian concept. In a recent contribution to the debate, William Charlton, an opponent of prime matter, has pointed out that the opposing parties have reached a stalemate in large measure because most of the relevant texts are ambiguous; consequently, "the question whether or not Aristotle believed in prime matter really comes down to the question how far, if at all, it is demanded by his philosophy as a whole. "{\textasciitilde} It seems to me that Charlton is right to shift the focus of the debate from questions of textual exegesis to questions of systematic relevance. However, within the context of Aristotle’s general theory of change, the challenge implicit in his statement can be met, for the concept of prime matter and its associated doctrine is the product of a series of ontological and scientific i Friedrich Solmsen, "Aristotle and Prime Matter," Journal of the History of Ideas 19 (a958): 243-52 and A. R. Lacey,"The Eleatics and Aristotle on Some Problems of Change," ibid. 26 (1965): 451-68; reply to H. R. King’s argument against prime matter, "Aristotle Without Prime Matter," ibid. 17 (1956): 37o-89; H. M. Robinson, "Prime Matter in Aristotle," Phronesis 19 (1974): 168-88 and C. J. F. Williams, Aristotle De Generatione et Corrpuptione, Oxford (1982), Appendix reply to an appendix rejecting prime matter in W. Charlton’s Aristotle’s Physics Books I-H (Oxford, 197o). See also Alan Code, "The Persistence of Aristotelian Matter," Philosophical Studies 29 0976): 357-67, who defends the traditional interpretation of matter against Barrington Jones, "Aristotle’s Introduction of Matter," Philosophical Review 83 (1974): 474-5{\textasciitilde} See also Russell M. Dancy, "Aristotle’s Second Thoughts on Substance," Philosophical Review 87 (1978): 372-413 9 William Charlton, "Prime Matter: A Rejoinder," Phronesis 28 (1983): a97-2a a, 197. 475 476 JOURNAL OF THE HISTORY OF PHILOSOPHY {\textasciitilde}5:4 OCT 1987 commitments made by Aristotle. At the same time, opponents of prime matter have a legitimate basis for criticizing the tradition, for there is something fundamentally wrong with the doctrine. Given Aristotle’s assumptions and commitments, the doctrine of prime matter is not only dialectically inevitable but also systematically incoherent. In this paper I shall not defend the existence of a doctrine of prime matter in Aristotle’s philosophy, although my argument will provide an incidental justification for it by exhibiting its function within Aristotle’s system. My aim here is to explain what is wrong with the doctrine of prime matter. (1) I shall examine a problem concerning prime matter–a problem of which Aristotle was aware and which he thought he had solved. (2) I shall argue that he did not solve the problem, for the doctrine of prime matter entails a paradox for his system. (3) I shall reply to some objections, and (4) I shall offer a tentative diagnosis of how Aristotle could have come to embrace a paradoxical position. 1. According to Aristotle’s theory of change, there is a substratum which underlies every change (Ph. 1.7.19oa33ff). When a thing changes its features, we call that accidental change and identify the substratum as substance. When a thing comes into being or ceases to be, we call that substantial change3 and identify the substratum as matter.4 The most simple bodies of the Aristotelian cosmos are the four traditional "elements": earth, air, fire, and water.5The elements are characterized by the contrary powers hot, cold, wet, and dry. Each element has one member of the contrary pair hot-cold, and one of the contrary pair wet-dry (Gen. Corr. 2.2-3). For Aristotle, it is... (shrink)

Explaining the Cosmos is a major reinterpretation of Greek scientific thought before Socrates. Focusing on the scientific tradition of philosophy, Daniel Graham argues that Presocratic philosophy is not a mere patchwork of different schools and styles of thought. Rather, there is a discernible and unified Ionian tradition that dominates Presocratic debates. Graham rejects the common interpretation of the early Ionians as "material monists" and also the view of the later Ionians as desperately trying to save scientific philosophy from Parmenides' (...) criticisms. In Graham's view, Parmenides plays a constructive role in shaping the scientific debates of the fifth century BC. Accordingly, the history of Presocratic philosophy can be seen not as a series of dialectical failures, but rather as a series of theoretical advances that led to empirical discoveries. Indeed, the Ionian tradition can be seen as the origin of the scientific conception of the world that we still hold today. (shrink)

The consensus among evolutionists seems to be that the morphological complexity of organisms increases in evolution, although almost no empirical evidence for such a trend exists. Most studies of complexity have been theoretical, and the few empirical studies have not, with the exception of certain recent ones, been especially rigorous; reviews are presented of both the theoretical and empirical literature. The paucity of evidence raises the question of what sustains the consensus, and a number of suggestions are offered, including the (...) possibility that certain cultural and/or perceptual biases are at work. In addition, a shift in emphasis from theoretical to empirical inquiry is recommended for the study of complexity, and guidelines for future empirical studies are proposed. (shrink)

Some arguments include imperative clauses. For example: ‘Buy me a drink; you can’t buy me that drink unless you go to the bar; so, go to the bar!’ How should we build a logic that predicts which of these arguments are good? Because imperatives aren’t truth apt and so don’t stand in relations of truth preservation, this technical question gives rise to a foundational one: What would be the subject matter of this logic? I argue that declaratives are used to (...) produce beliefs, imperatives are used to produce intentions, and beliefs and intentions are subject to rational requirements. An argument will strike us as valid when anyone whose mental state satisfies the premises is rationally required to satisfy the conclusion. For example, the above argument reflects the principle that it is irrational not to intend what one takes to be the necessary means to one’s intended ends. I argue that all intuitively good patterns of imperative inference can be explained using off-the-shelf formulations of our rational requirements. I then develop a formal-semantic theory embodying this view that predicts a range of data, including free-choice effects and Ross’s paradox. The resulting theory shows one way that our aspirations to rational agency can be discerned in the patterns of our speech, and is a case study in how the philosophy of language and the philosophy of action can be mutually illuminating. (shrink)

This 1997 work is a book-length treatment of the unique nature and development of Nietzsche's post-Zarathustran political philosophy. This later political philosophy is set in the context of the critique of modernity that Nietzsche advances in the years 1885–1888, in such texts as Beyond Good and Evil, On the Genealogy of Morals, Twilight of the Idols, The Antichrist, The Case of Wagner, and Ecce Homo. In this light Nietzsche's own diagnosis of the ills of modernity is subject to the same (...) criticism that he himself levelled against previous philosophies; that it is an involuntary symptom of the age it represents. Nietzsche is seen to be aware of his own decadence and of his complicity with the very tendencies that he dissects and deplores. By relating the political philosophy, the critique of modernity and the theory of decadence Daniel Conway has written a powerful book about Nietzsche's own appreciation of the limitations of both his writing style and of his famous prophetic 'stance'. (shrink)

Our ability to locate moral responsibility is often thought to be a necessary condition for conducting morally permissible medical practice, engaging in a just war, and other high-stakes endeavors. Yet, with increasing reliance upon artificially intelligent systems, we may be facing a wideningresponsibility gap, which, some argue, cannot be bridged by traditional concepts of responsibility. How then, if at all, can we make use of crucial emerging technologies? According to Colin Allen and Wendell Wallach, the advent of so-called ‘artificial moral (...) agents’ (AMAs) is inevitable. Still, this notion may seem to push back the problem, leaving those who have an interest in developing autonomous technology with a dilemma. We may need to scale-back our efforts at deploying AMAs (or at least maintain human oversight); otherwise, we must rapidly and drastically update our moral and legal norms in a way that ensures responsibility for potentially avoidable harms. This paper invokes contemporary accounts of responsibility in order to show how artificially intelligent systems might be held responsible. Although many theorists are concerned enough to develop artificial conceptions ofagencyor to exploit our present inability to regulate valuable innovations, the proposal here highlights the importance of—and outlines a plausible foundation for—a workable notion ofartificial moral responsibility. (shrink)

In Nietzsche's "On the Genealogy of Morals": A Reader's Guide, Daniel Conway explains the philosophical background against which the book was written, the wider context of Western morality in general and the key themes and topics inherent ...

"The Invention of Modern Science proposes a fruitful way of going beyond the apparently irreconcilable positions, that science is either "objective" or "socially constructed." Instead, suggests Isabelle Stengers, one of the most important and influential philosophers of science in Europe, we might understand the tension between scientific objectivity and belief as a necessary part of science, central to the practices invented and reinvented by scientists."--pub. desc.

What is the role of communication technology and media in making American society more adaptive, equitable, and democratic? Analyzing the field of communication against an in-depth picture of American society, this provocative, wide-ranging text explores how communication enterprises are intrinsically linked to the establishment and maintenance of social power. Throughout the book, changes in communication capabilities are related to changes in wealth and income distribution, the structures of economic organizations, work and the professions, minorities, law and government, urbanization, popular culture, (...) and globalization. In an engaging narrative the author presents empirical evidence that suggests that popular beliefs about the democratic role of media and communications often are misguided. While we are in an information age, it is not an information revolution that can liberate society. Emphasizing new technologies and media in contemporary American society, Rossides shows how most forms of social communication throughout history—language, gestures, clothing, buildings and spaces, ships and railroads—have sustained social power. (shrink)

In this study, Daniel W. Graham addresses two major problems in interpreting Aristotle. First, should we reconcile the apparent inconsistencies of the corpus by assuming an underlying unity of doctrine, or by positing a sequence of developing ideas? Secondly,what is the relation between the so-called logical works on the one hand and the physical-metaphysical treatises on the other? Although the problems appear to be unrelated, Graham finds that the key to the first lies in the second, and in doing (...) so provides the first major alternative to theunitarian approach since Jaeger's pioneering developmental study of 1923. (shrink)

Moral distress in healthcare has been an increasingly prevalent topic of discussion. Most authors characterize it as a negative phenomenon, while few have considered its potentially positive value. In this essay, I argue that moral distress can reveal and affirm some of our most important concerns as moral agents. Indeed, the experience of it under some circumstances appears to be partly constitutive of an honorable character and can allow for crucial moral maturation. The potentially positive value, then, is twofold; moral (...) distress carries both aretaic and instrumental value. Granted, this position is not without its caveats, but by making these clear, I provide a novel framework for policy recommendations regarding when, if ever, we should work to reduce moral distress. (shrink)

A global pandemic on the scale of Covid-19 upsets all standard decision protocols. Pressure from politicians to "open up" the economy presumes that individuals grant credible trust to politicians and merchants eager to recover customers. The asymmetric concern for safety compounds normal heuristics. The Peircean pragmatic maxim reminds us that it is the perceived effects of a post-pandemic society and economy that will drive human volition in the aftermath of Covid-19. Opening up does not equal showing up.

I argue that semantics is the study of the proprietary database of a centrally inaccessible and informationally encapsulated input–output system. This system’s role is to encode and decode partial and defeasible evidence of what speakers are saying. Since information about nonlinguistic context is therefore outside the purview of semantic processing, a sentence’s semantic value is not its content but a partial and defeasible constraint on what it can be used to say. I show how to translate this thesis into a (...) detailed compositional-semantic theory based on the influential framework of Heim and Kratzer. This approach situates semantics within an independently motivated account of human cognitive architecture and reveals the semantics–pragmatics interface to be grounded in the underlying interface between modular and central systems. (shrink)

Medical errors are all too common. Ever since a report issued by the Institute of Medicine raised awareness of this unfortunate reality, an emerging theme has gained prominence in the literature on medical error. Fears of blame and punishment, it is often claimed, allow errors to remain undisclosed. Accordingly, modern healthcare must shift away from blame towards a culture of safety in order to effectively reduce the occurrence of error. Against this shift, I argue that it would serve the medical (...) community well to retain notions of individual responsibility and blame in healthcare settings. In particular, expressions of moral emotions—such as guilt, regret and remorse—appear to play an important role in the process of disclosing harmful errors to patients and families. While such self-blaming responses can have negative psychological effects on the individual practitioner, those who take the blame are in the best position to offer apologies and show that mistakes are being taken seriously, thereby allowing harmed patients and families to move forward in the wake of medical error. (shrink)

Several researchers have suggested that a talented, quality workforce will become a more important source of competitive advantage for firms in the future. Drawing on social identity theory and signaling theory, the authors hypothesize that firms can use their corporate social performance (CSP) activities to attract job applicants. Specifically, signaling theory suggests that a firm’s CSP sends signals to prospective job applicants about what it would be like to work for a firm. Social identity theory suggests that job applicants have (...) higher self-images whenworking for socially responsive firms over their less responsive counterparts. The authors conducted an experiment in which they manipulated CSP and found that prospective job applicants are more likely to pursue jobs from socially responsible firms than from firms with poor social performance reputations. The implications of these findings for academicians and practitioners alike are discussed. (shrink)

Working in ZF+AD alone, we prove that every set of ordinals with cardinality at least Θ can be covered by a set of ordinals in HOD of K (ℝ) of the same cardinality, when there is no inner model with an ℝ-complete measurable cardinal. Here ℝ is the set of reals and Θ is the supremum of the ordinals which are the surjective image of ℝ.

Recent medical and bioethics literature shows a growing concern for practitioners’ emotional experience and the ethical environment in the workplace. Moral distress, in particular, is often said to result from the difficult decisions made and the troubling situations regularly encountered in health care contexts. It has been identified as a leading cause of professional dissatisfaction and burnout, which, in turn, contribute to inadequate attention and increased pain for patients. Given the natural desire to avoid these negative effects, it seems to (...) most authors that systematic efforts should be made to drastically reduce moral distress, if not altogether eliminate it from the lives of vulnerable practitioners. Such efforts, however, may be problematic, as moral distress is not adequately understood, nor is there agreement among the leading accounts regarding how to conceptualize the experience. With this article I make clear what a robust account of moral distress should be able to explain and how the most common notions in the existing literature leave significant explanatory gaps. I present several cases of interest and, with careful reflection upon their distinguishing features, I establish important desiderata for an explanatorily satisfying account. With these fundamental demands left unsatisfied by the leading accounts, we see the persisting need for a conception of moral distress that can capture and delimit the range of cases of interest. (shrink)

Robotic and artificially intelligent (AI) systems are becoming prevalent in our day-to-day lives. As human interaction is increasingly replaced by human–computer and human–robot interaction (HCI and HRI), we occasionally speak and act as though we are blaming or praising various technological devices. While such responses may arise naturally, they are still unusual. Indeed, for some authors, it is the programmers or users—and not the system itself—that we properly hold responsible in these cases. Furthermore, some argue that since directing blame or (...) praise at technology itself is unfitting, designing systems in ways that encourage such practices can only exacerbate the problem. On the other hand, there may be good moral reasons to continue engaging in our natural practices, even in cases involving AI systems or robots. In particular, daily interactions with technology may stand to impact the development of our moral practices in human-to-human interactions. In this paper, we put forward an empirically grounded argument in favor of some technologies being designed for social responsiveness. Although our usual practices will likely undergo adjustments in response to innovative technologies, some systems which we encounter can be designed to accommodate our natural moral responses. In short, fostering HCI and HRI that sustains and promotes our natural moral practices calls for a co-developmental process with some AI and robotic technologies. (shrink)

Artificial intelligence and robotic technologies have become nearly ubiquitous. In some ways, the developments have likely helped us, but in other ways sophisticated technologies set back our interests. Among the latter sort is what has been dubbed the ‘severance problem’—the idea that technologies sever our connection to the world, a connection which is necessary for us to flourish and live meaningful lives. I grant that the severance problem is a threat we should mitigate and I ask: how can we stave (...) it off? In particular, the fact that some technologies exhibit behavior that is unclear to us seems to constitute a kind of severance. Building upon contemporary work on moral responsibility, I argue for a mechanism I refer to as ‘technological answerability’, namely the capacity to recognize human demands for answers and to respond accordingly. By designing select devices—such as robotic assistants and personal AI programs—for increased answerability, we see at least one way of satisfying our demands for answers and thereby retaining our connection to a world increasingly occupied by technology. (shrink)

Gregory Vlastos was one of the twentieth century's most influential scholars of ancient philosophy. Over a span of more than fifty years, he published essays and book reviews that established his place as a leading authority on early Greek philosophy. The two volumes that comprise Studies in Greek Philosophy include nearly forty contributions by this acknowledged master of the philosophical essay. Many of these pieces are now considered to be classics in the field. Perhaps more than any other modern scholar, (...) Gregory Vlastos was responsible for raising standards of research, analysis, and exposition in classical philosophy to new levels of excellence. His essays have served as paradigms of scholarship for several generations. Available for the first time in a comprehensive collection, these contributions reveal the author's ability to combine the skills of a philosopher, philologist, and historian of ideas in addressing some of the most difficult problems of ancient philosophy. Volume I collects Vlastos's essays on Presocratic philosophy. Wide-ranging concept studies link Greek science, religion, and politics with philosophy. Individual studies illuminate the thought of major philosophers such as Heraclitus, Parmenides, Anaxagoras, and Democritus. A magisterial series of studies on Zeno of Elea reveals the author's power in source criticism and logical analysis. Volume II contains essays on the thought of Socrates, Plato, and later thinkers and essays dealing with ethical, social, and political issues as well as metaphysics, science, and the foundations of mathematics. (shrink)

Gilles Deleuze was one of the most influential philosophers of the twentieth-century, and Smith is widely recognized to be one of his most penetrating interpreters, as well as an important philosophical voice in his own right. Combining his most important pieces over the last fifteen years along with two new essays, this book is Smith 's definitive treatise on Deleuze. The essays are divided into four sections, which cover Deleuze's use of the history of philosophy, an overview of his philosophical (...) system, an analysis of several Deleuzian concepts, as well as an assessment of his position within contemporary philosophy. (shrink)

This study examines firms that have experienced an industrial and/or environ-mental crisis and proposes that top management team (TMT) characteristics will affect a firm's ability to minimize the severity of these crisis events. Specifically, heterogeneity in the TMT will exhibit a curvilinear (U-shaped) relationship with the severity of firm crises. Our results suggest that a moderate level of age and tenure heterogeneity are positively related to a firm's ability to successfully minimize the severity of crises. Variance in educational backgrounds was (...) unrelated to crisis severity. Functional background heterogeneity exhibited a curvilinear relationship with crisis severity but was not U-shaped as hypothesized. (shrink)

The conventional wisdom declares that evolution is not goal directed, that teleological considerations play no part in our understanding of evolutionary trends. Here I argue that, to the contrary, under a current view of teleology, field theory, most evolutionary trends would have to be considered goal directed to some degree. Further, this view is consistent with a modern scientific outlook, and more particularly with evolutionary theory today. Field theory argues that goal directedness is produced by higher-level fields that direct entities (...) contained within them to behave persistently and plastically, that is, returning them to a goal-directed trajectory following perturbations (persistence) and directing them to a goal-directed trajectory from a large range of alternative starting points (plasticity). The behavior of a bacterium climbing a chemical food gradient is persistent and plastic, with guidance provided by the external “food field,” the chemical gradient. Likewise, an evolutionary trend that is produced by natural selection is a lineage behaving persistently and plastically under the direction of its local ecology, an “ecological field.” Trends directed by selection-generated boundaries, thermodynamic gradients, and certain internal constraints, would also count as goal directed. In other words, most of the causes of evolutionary trends that have been proposed imply goal directedness. However, under field theory, not all trends are goal directed. Examples are discussed. Importantly, nothing in this view suggests that evolution is guided by intentionality, at least none at the level of animal intentionality. Finally, possible implications for our thinking about evolutionary directionality in the history of life are discussed. (shrink)

Wants, preferences, and cares are physical things or events, not ideas or propositions, and therefore no chain of pure logic can conclude with a want, preference, or care. It follows that no pure-logic machine will ever want, prefer, or care. And its behavior will never be driven in the way that deliberate human behavior is driven, in other words, it will not be motivated or goal directed. Therefore, if we want to simulate human-style interactions with the world, we will need (...) to first understand the physical structure of goal-directed systems. I argue that all such systems share a common nested structure, consisting of a smaller entity that moves within and is driven by a larger field that contains it. In such systems, the smaller contained entity is directed by the field, but also moves to some degree independently of it, allowing the entity to deviate and return, to show the plasticity and persistence that is characteristic of goal direction. If all this is right, then human want-driven behavior probably involves a behavior-generating mechanism that is contained within a neural field of some kind. In principle, for goal directedness generally, the containment can be virtual, raising the possibility that want-driven behavior could be simulated in standard computational systems. But there are also reasons to believe that goal-direction works better when containment is also physical, suggesting that a new kind of hardware may be necessary. (shrink)

Cross-cultural studies have revealed broad quantitative associations between subsistence practice and demographic parameters for preindustrial populations. One explanation is that variationin the availability of suitable weaning foods influenced the frequency and duration of breastfeeding and thus the length of interbirth intervals and the probability of child survival (the “weaning food availability” hypothesis). We examine the available data on weaning age variation in preindustrial populations and report results of a cross-cultural test of the predictions that weaning occurred earlier in agricultural and (...) pastoral populations because dairy and cereal production increased the availability of easily digestible, nutrientrich foods appropriate for weaning. We found that, contrary to predictions, supplementation with liquid foods other than breast milk was delayed in agricultural populations relative to less agriculturally dependent ones and complementary feeding with solid foods was delayed in pastoral populations relative to those less dependent on herding. Although the duration of breastfeeding was longer in populations dependent on hunting, there was no qualitative evidence that such populations lacked foods appropriate for weaning. The patterns observed suggest that the relationships between demography and subsistence observed among preindustrial societies cannot be explained by the “weaning food availability” hypothesis. We discuss the implications for understanding the mechanisms underlying prehistoric human demography, subsistence shifts, allocation to parenting and mating effort, and the evolutionary implications of tradeoffs between diet and disease. (shrink)