The American Academy of Pediatrics Task Force on Circumcision published its policy statement and technical report on newborn circumcision in September 2012.1 ,2 Since that time, some individuals and groups have voiced objections to the work of the Task Force, while others have conveyed their support. The AAP task force is pleased that the policy statement and technical reports on circumcision have stimulated debate on this topic and welcomes respectful discussion and dialogue about the scientific and ethical issues that surround (...) neonatal circumcision. We believe this is a complex issue that does not lend itself to simplistic solutions. The Task Force encourages those of all viewpoints to contribute to a vibrant, thoughtful and respectful evidence-based dialogue. We appreciate that the free exchange of competing ideas is a necessary component of scientific discovery. We also recognise that all clinical decisions carry ethical dimensions and that a respectful and thoughtful dialogue about these issues is important. However, the Task Force also feels strongly that this debate and the academic literature are demeaned when those with an ideological agenda disseminate inaccurate information, misapply scientific principles, make accusations that are unsupported, communicate in a vitriolic tone, and attempt to discredit and mischaracterise alternative views and those who hold them. Healthy debate and …. (shrink)

Since its introduction in 1987, Benjamin Freedman’s principle of clinical equipoise has enjoyed widespread uptake in bioethics discourse. Recent years, however, have witnessed a growing consensus that the principle is fundamentally flawed. One of the most vocal critics has undoubtedly been Franklin Miller. In a 2008 paper, Steven Joffe and Miller build on this critical work, offering a new conception of clinical research ethics based on science, taking what they call a “scientific orientation” toward the ethics of clinical (...) research. Though there is much to recommend Joffe and Miller’s scientifically oriented conception of clinical research ethics, I believe that both the critical and constructive projects suffer from the same basic mistake: inattention to context. The internal norms of science cannot be fully specified, let alone satisfied, independently of contextual (external) factors that only come into view when we are attentive to the particular context of that form of inquiry. (shrink)

During human evolutionary history, there were “trade-offs” between expending time and energy on child-rearing and mating, so both men and women evolved conditional mating strategies guided by cues signaling the circumstances. Many short-term matings might be successful for some men; others might try to find and keep a single mate, investing their effort in rearing her offspring. Recent evidence suggests that men with features signaling genetic benefits to offspring should be preferred by women as short-term mates, but there are trade-offs (...) between a mate's genetic fitness and his willingness to help in child-rearing. It is these circumstances and the cues that signal them that underlie the variation in short- and long-term mating strategies between and within the sexes. Key Words: conditional strategies; evolutionary psychology; fluctuating asymmetry; mating; reproductive strategies; sexual selection. (shrink)

A normative framework for modeling causal and counterfactual reasoning has been proposed by Spirtes, Glymour, and Scheines. The framework takes as fundamental that reasoning from observation and intervention differ. Intervention includes actual manipulation as well as counterfactual manipulation of a model via thought. To represent intervention, Pearl employed the do operator that simplifies the structure of a causal model by disconnecting an intervened-on variable from its normal causes. Construing the do operator as a psychological function affords predictions about how people (...) reason when asked counterfactual questions about causal relations that we refer to as undoing, a family of effects that derive from the claim that intervened-on variables become independent of their normal causes. Six studies support the prediction for causal arguments but not consistently for parallel conditional ones. Two of the studies show that effects are treated as diagnostic when their values are observed but nondiagnostic when they are intervened on. These results cannot be explained by theories that do not distinguish interventions from other sorts of events. (shrink)

By "theory" we mean a special project in literary criticism: the attempt to govern interpretations of particular texts by appealing to an account of interpretation in general. The term is sometimes applied to literary subjects with no direct bearing on the interpretation of individual works, such as narratology, stylistics, and prosody. Despite their generality, however, these subjects seem to us essentially empirical, and our argument against theory will not apply to them.Contemporary theory has taken two forms. Some theorists have sought (...) to ground the reading of literary texts in methods designed to guarantee the objectivity and validity of interpretations. Others, impressed by the inability of such procedures to produce agreement among interpreters, have translated that failure into an alternative mode of theory that denies the possibility of correct interpretation. Our aim here is not to choose between these two alternatives but rather to show that both rest on a single mistake, a mistake that is central to the notion of theory per se. The object of our critique is not a particular way of doing theory but the idea of doing theory at all.Theory attempts to solve—or to celebrate the impossibility of solving—a set of familiar problems: the function of authorial intention, the status of literary language, the role of interpretive assumptions, and so on. We will not attempt to solve these problems, nor will we be concerned with tracing their history or surveying the range of arguments they have stimulated. In our view, the mistake on which all critical theory rests has been to imagine that these problems are real. In fact, we will claim such problems only seem real--and theory itself only seems possible or relevant—when theorists fail to recognize the fundamental inseparability of the elements involved.The clearest example of the tendency to generate theoretical problems by splitting apart terms that are in fact inseparable is the persistent debate over the relation between authorial intention and the meaning texts. Some theorists have claimed that valid interpretations can only be obtained through an appeal to authorial intentions. This assumption is shared by theorists who, denying the possibility of recovering authorial intentions, also deny the possibility of valid interpretations. But once it is seen that the meaning of a text is simply identical to the author's intended meaning, the project of grounding meaning in intention becomes incoherent. Since the project itself is incoherent, it can neither succeed nor fail, hence both theoretical attitudes toward intention are irrelevant. The mistake made by theorists has been to imagine the possibility or desirability of moving from one term to a second term , when actually the two terms are the same. One can neither succeed nor fail in deriving one term from the other, since to have one is already to have them both.In the following two sections we will try to show in detail how theoretical accounts of intention always go wrong. In the fourth section we will undertake a similar analysis of an influential account of the role interpretive assumptions or beliefs play in the practice of literary criticism. The issues of belief and intention are, we think, central to the theoretical enterprise; our discussion of them is thus directed not only against specific theoretical arguments but against theory in general. Our examples are meant to represent the central mechanism of all theoretical arguments, and our treatment of them is meant to indicate that all such arguments will fail and fail in the same way. If we are right, then the whole enterprise of critical theory is misguided and should be abandoned. (shrink)

Most discussions of Spinoza and consciousness—and there are not many— conclude either that he does not have an account of consciousness, or that he does have one but that it is at best confused, at worst hopeless. I argue, in fact, that people have been looking in the wrong place for Spinoza's account of consciousness, namely, at his doctrine of "ideas of ideas". Indeed, Spinoza offers the possibility of a fairly sophisticated, naturalistic account of consciousness, one that grounds it in (...) the nature and capacities of the body. Consciousness for Spinoza, I suggest, is a certain complexity in thinking that is the correlate of the complexity of a body, and human consciousness, for Spinoza, is nothing but the correlate in Thought of the extraordinarily high complexity of the human body in Extension. In this respect, Spinoza anticipates the conception of mind that is presently emerging from studies in the so-called ‘embodied mind’ research program. Moreover, this research program, in turn, may hold out hope for a clearer understanding of some of Spinoza's more difficult claims. CiteULike Connotea Del.icio.us What's this? (shrink)

Topics in Cognitive Science, Volume 14, Issue 1, Page 31-44, January 2022.

Several prominent philosophers have argued that the fact that depressed agents sometimes make moral judgments without being appropriately motivated supports Humean externalism – the view that moral motivation must be explained in terms of desires that are distinct from or “external” to an agent’s motivationally inert moral judgments. This essay argues that such motivational failures do not, in fact, provide evidence for this view. I argue that, if the externalist argument from depression is to undermine a philo-sophically important version of (...) internalism, it must make use of a general assumption about motivational states. However, at a reasonable level of abstraction, the needed assumption also implies that even desires could not be effective sources of motivation. For, just as depressed agents might sometimes lack motivation to act consistently with their moral judgments, they also sometimes lack motivation to pursue their desires. Moreover, the most plausible responses that Humeans can give to this general argument undermine the externalist case against internalism. Thus, there is a deep tension between the argument from depression for externalism and a fundamental Humean commitment. (shrink)

The verbs cause, enable, and prevent express beliefs about the way the world works. We offer a theory of their meaning in terms of the structure of those beliefs expressed using qualitative properties of causal models, a graphical framework for representing causal structure. We propose that these verbs refer to a causal model relevant to a discourse and that “A causes B” expresses the belief that the causal model includes a link from A to B. “A enables/allows B” entails that (...) the model includes a link from A to B, that A represents a category of events necessary for B, and that an alternative cause of B exists. “A prevents B” entails that the model includes a link from A to B and that A reduces the likelihood of B. This theory is able to account for the results of four experiments as well as a variety of existing data on human reasoning. (shrink)

_A Companion to Relativism_ presents original contributions from leading scholars that address the latest thinking on the role of relativism in the philosophy of language, epistemology, ethics, philosophy of science, logic, and metaphysics. Features original contributions from many of the leading figures working on various aspects of relativism Presents a substantial, broad range of current thinking about relativism Addresses relativism from many of the major subfields of philosophy, including philosophy of language, epistemology, ethics, philosophy of science, logic, and metaphysics.

Spinoza is often taken to claim that suicide is never a rational act, that a ‘free’ person acting by the guidance of reason will never terminate his/her own existence. Spinoza also defends the prima facie counterintuitive claim that the rational person will never act dishonestly. This second claim can, in fact, be justified when Spinoza's moral psychology and account of motivation are properly understood. Moreover, making sense of the free man's exception-less honesty in this way also helps to clarify how (...) Spinoza should, and indeed does, recognize the possibility of rational suicide. (shrink)

In this essay I shall focus on the adoption of the Semantic Approach by structural realists, including myself, who have done so on the grounds that it wears its structuralist sympathies on its sleeve. Despite this, the SA has been identified as standing in tension with the ontological commitments of the so-called ’ontic’ form of this view and so I shall explore that tension before discussing the usefulness of the SA in framing scientific representation and concluding with a discussion of (...) the implications of the ontological status of theories and models themselves. (shrink)

Why was the great philosopher Spinoza expelled from his Portuguese-Jewish community in Amsterdam? Nadler's investigation of this simple question gives fascinating new perspectives on Spinoza's thought and the Jewish religious and philosophical tradition from which it arose.

The explanatory/pragmatic-trial distinction enjoys a burgeoning philosophical and medical literature and a significant contingent of support among philosophers and healthcare stakeholders as an important way to assess the design and results of randomized controlled trials. A major motivation has been the need to provide relevant, generalizable data to drive healthcare decisions. While talk of pragmatic and explanatory trials could be seen as convenient shorthand, the distinction can also be seen as harboring deeper issues related to inferential strategies used to evaluate (...) causal claims regarding medical treatments. A comprehensive, critical analysis of the distinction and underlying epistemological framework upon which the distinction is based, particularly with respect to treatment effectiveness, has yet to be forthcoming. I provide this, analyzing the distinction’s relationship to generalizability and cognate distinctions between ideal conditions and real-world practice, internal and external validity, and efficacy and effectiveness. I also analyze recent philosophical work that relies on the explanatory/pragmatic-trial distinction and that advocates for more pragmatic trials. I conclude that as an organizing principle for trial-design decisions and trial evaluation, the explanatory/pragmatic-trial distinction is conceptually problematic and not as useful as its proponents seem to think. Since some pragmatic-trial features can be inimical to establishing treatment effectiveness, pragmatic-trial features should not be conflated with pragmatic trials’ avowed goals. If the distinction is to be useful, it and some associated concepts, including generalizability, should be reformulated, lest they continue to underlie a medical epistemology that could contribute to methodologically flawed and potentially unethical advice for the design and interpretation of trials. (shrink)

While there are many competing accounts and scales of intellectual humility, philosophers and psychologists are generally united in treating it as an epistemically _beneficial_ disposition of _individual_ agents. I call the research guided by this supposition the _traditional approach_ to studying intellectual humility. The traditional approach is entirely understandable in light of recent findings that individual differences in intellectual humility are associated with various deleterious epistemic tendencies. Nonetheless, I argue that its near monopoly has resulted in an underestimation of important (...) limitations of human cognition. In particular, it neglects the fact that intellectual arrogance can be both deeply recalcitrant and significantly beneficial for bounded cognitive agents whose reliance on one another is profound. I propose to integrate these insights into the study of intellectual humility by treating it as a _collective virtue_ that gets manifested in the structure of epistemic environments. More specifically, it is an interactive virtue that harnesses and constrains intellectual arrogance to yield benefits for both individuals and collectives. I claim that this can happen only within _humbling environments_, such as forecasting tournaments and open institutional science. (shrink)

Recent research highlights the positive effects of organizational CSR engagement on employee outcomes, such as job and life satisfaction, performance, and trust. We argue that the current debate fails to recognize the potential risks associated with CSR. In this study, we focus on the risk of work addiction. We hypothesize that CSR has per se a positive effect on employees and can be classified as a resource. However, we also suggest the existence of an array of unintended negative effects of (...) CSR. Since CSR positively influences an employee’s organizational identification, as well as his or her perception of engaging in meaningful work, which in turn motivates them to work harder while neglecting other spheres of their lives such as private relationships or health, CSR indirectly increases work addiction. Accordingly, organizational identification and work meaningfulness both act as buffering variables in the relationship, thus suppressing the negative effect of CSR on work addiction, which weakens the positive role of CSR in the workplace. Drawing on a sample of 565 Swiss employees taken from the 2017 Swiss Public Value Atlas dataset, our results provide support for our rationale. Our results also provide evidence that the positive indirect effects of organizational CSR engagement on work addiction, via organizational identification and work meaningfulness, become even stronger when employees care for the welfare of the wider public. Implications for research and practice are discussed. (shrink)

Bovine tuberculosis is a controversial animal health policy issue in England, which impacts farmers, the public, cattle and badgers. Badgers act as a wildlife reservoir of disease. Policy options for badger control include do nothing, badger culling, and badger vaccination. This paper argues for mandatory Animal Welfare Impact Assessment for all policy that significantly affects sentient animals. AWIA includes species description, and AWIA analysis stages. In this paper, AWIA is applied to impacts of bovine TB policy options on cattle and (...) badgers. Over 4 years, 85,000 badgers will be culled to prevent the slaughter of ~17,750 cattle over 9 years. Hence, about five badgers are culled for every cow which avoids slaughter. The AWIA analyses the impact of badger vaccination on cows and badgers based on a set of stated assumptions. The AWIA estimates badger vaccination to reduce the number of cows slaughtered by 11,600, i.e. a 12.5% reduction. Additional to the harm of killing, culling has greater welfare impacts on badgers compared to non-culling options. Actors in animal health and welfare policy were interviewed about the concept of AWIA. Policy actors supported the idea of AWIA to provide objective data to feed into policy making. The paper concludes with the proposal that AWIA is a necessary stage of just policy making where sentient animals are impacted by government policy. (shrink)

It is widely held that there is a legal right to privacy that plays such a central role in a number of important US Supreme Court decisions. There is however a great deal of dispute about whether there is a moral right to privacy and if there is, what grounds the right. Before this can be determined, we must be clear about the nature of privacy, something that is not clearly understood and that, as we shall see, is often confused (...) with the right to privacy. I shall begin with a critical discussion of various views about the nature of privacy. I shall then present my own account, and show how it meets the objections that have been raised against other views. Lastly, I shall close with a discussion about whether privacy is a moral right. (shrink)

Richard Arthur and I proposed that the present in Minkowski spacetime should be thought of as a small causal diamond. That is, given two timelike separated events p and q, with p earlier than q, they suggested that the present is the set I+ ∩ I-. Mauro Dorato presents three criticisms of this proposal. I rebut all three and then offer two more plausible criticisms of the Arthur/Savitt proposal. I argue that these criticisms also fail.

We present an investigation of the ways in which speakers' subjective perspectives are likely to affect the meaning of gradable adjectives like tall or heavy. We present the results of a study showing that people tend to use themselves as a yardstick when ascribing these adjectives to human figures of varied measurements: subjects' height and weight requirements for applying tall and heavy are found to be positively correlated with their personal measurements. We draw more general lessons regarding the definition of (...) subjectivity and the ways in which a standard of comparison and a significant deviation from that standard are specified. (shrink)

In a study of the kin investment of aunts and uncles we show that the laterality effect expected as a result of paternity uncertainty is statistically reliable but somewhat smaller than the sex effect. Matrilateral aunts invest significantly more than patrilateral aunts, and the same is true for uncles. Regardless of laterality, however, aunts invest significantly more than uncles. Multivariate controls show that the matrilateral bias is fully independent of any age or distance confounds that might result from sex differences (...) in age at marriage or dispersal. We discuss our results in relation to recent findings on the kin investment of grandparents (Euler and Weitzel 1996). In addition, we propose a simple method for estimating the level of paternity uncertainty from kin investment data; application of this method to our data on aunts and uncles suggests that between 13% and 20% of children are not the offspring of their putative father. Our parallel analyses of Euler and Weitzel’s (1996) data on grandparental investment suggest a similar estimate, that paternity uncertainty lies between 9% and 17%. (shrink)

Much contemporary thinking about language is animated by the idea that the core function of language is to represent how the world is and that therefore the notion of representation should play a fundamental explanatory role in any explanation of language and language use. Leading thinkers in the field explore various ways this idea may be challenged as well as obstacles to developing various forms of anti-representationalism. Particular attention is given to deflationary accounts of truth, the role of language in (...) expressing mental states, and the normative and the natural as they relate to issues of representation. The chapters further various fundamental debates in metaphysics--for example, concerning the question of finding a place for moral properties in a naturalistic world-view--and illuminate the relation of the recent neo-pragmatist revival to the expressivist stream in analytic philosophy of language. (shrink)

In part I of this paper, I argue that #MeToo testimony increases epistemic value for the survivor qua hearer when experiences like hers are represented by others; for society at large when false but dominant narratives about sexual violence and sexual harassment against women are challenged and replaced with true stories; and for the survivor qua teller when her true story is believed. In part II, I argue that the epistemic significance of #MeToo testimony compels us to consider the tremendous (...) and often unappreciated costs to the individual tellers, and the increased credibility they are owed in virtue thereof. (shrink)

According to cognitivist truth-theoretic accounts of semantic competence, aspects of our linguistic behavior can be explained by ascribing to speakers cognition of truth theories. It's generally assumed on this approach that, however much context sensitivity speakers' languages contain, the cognized truththeories themselves can be adequately characterized context insensitively—that is, without using in the metalanguage expressions whose semantic value can vary across occasions of utterance. In this paper, I explore some of the motivations for and problems and consequences of dropping this (...) assumption. (shrink)

Through an exploration of theoretical physics, this paper suggests the need for regrounding natural science in phenomenological philosophy. To begin, the philosophical roots of the prevailing scientific paradigm are traced to the thinking of Plato, Descartes, and Newton. The crisis in modern science is then investigated, tracking developments in physics, science's premier discipline. Einsteinian special relativity is interpreted as a response to the threat of discontinuity implied by the Michelson-Morley experiment, a challenge to classical objectivism that Einstein sought to counteract. (...) We see that Einstein's efforts to banish discontinuity ultimately fall into the “black hole” predicted in his general theory of relativity. The unavoidable discontinuity that haunts Einstein's theory is also central to quantum mechanics. Here too the attempt has been made to manage discontinuity, only to have this strategy thwarted in the end by the intractable problem of quantum gravity. The irrepressible discontinuity manifested in the phenomena of modern physics proves to be linked to a merging of subject and object that flies in the face of Cartesian philosophy. To accommodate these radically non-classical phenomena, a new philosophical foundation is called for: phenomenology. Phenomenological philosophy is elaborated through Merleau-Ponty's concept of depth and is then brought into focus for use in theoretical physics via qualitative work with topology and hypercomplex numbers. In the final part of this paper, a detailed summary is offered of the specific application of topological phenomenology to quantum gravity that was systematically articulated in The Self-Evolving Cosmos (Rosen 2008a). (shrink)

To what risks may children participating in research be subjected? Institutional review boards can stand surrogate for parents by filtering out studies whose risk is unacceptably high.

There have been many efforts to infer causation from association byusing statistical models. Algorithms for automating this processare a more recent innovation. In Humphreys and Freedman[(1996) British Journal for the Philosophy of Science 47, 113–123] we showed that one such approach, by Spirtes et al., was fatally flawed. Here we put our arguments in a broader context and reply to Korb and Wallace [(1997) British Journal for thePhilosophy of Science 48, 543–553] and to Spirtes et al.[(1997) British Journal for (...) the Philosophy of Science 48, 555–568]. Their arguments leave our position unchanged: claims to have developed a rigorous engine for inferring causation from association are premature at best, the theorems have no implications for samples of any realistic size, and the examples used to illustrate the algorithms are indicative of failure rather than success. The gap between association and causation has yet to be bridged. (shrink)

Peter Lipton has attempted to flesh out a model of Inference to the Best Explanation (IBE) by clarifying explanation in terms of a causal model. But Lipton's account of explanation makes an adequate explanation depend on a principle which is virtually identical to Mill's Method of Difference. This has the result of collapsing IBE on Lipton's account of it into causal inference as conceived by the Causal-Inference model of induction. According to this model, many of our inductions are inferences from (...) effects to their probable causes, and Mill's Methods are canons to guide such inferences. Thus, Lipton's account of IBE fails to represent an advance over the already familiar Causal-Inference Model of induction. (shrink)

Following societal and policy pressures for responsible innovation, innovators are more and more expected to consider the broader socio-ethical context of their work, and more importantly, to integrate such considerations into their daily practices. This may require the involvement of ‘outsiders’ in innovation trajectories, including e.g. societal and governmental actors. However, methods on how to functionally organize such integration in light of responsible innovation have only recently started to emerge. We present an approach to do just that, in which we (...) first develop value profiles of the involved actors, and second, design a workshop setting that allows innovators to develop design requirements in collaboration with representatives of parties that are not usually involved in such innovation design practices. Using a case study in automated vehicle development, we positively demonstrate the possibility and utility of our approach. We stress that in this study we wish to demonstrate the functionality of our developed method, and did not search for scientifically valid outcomes regarding this technical field. (shrink)

For more than fifty years, taxonomists have proposed numerous alternative definitions of species while they searched for a unique, comprehensive, and persuasive definition. This monograph shows that these efforts have been unnecessary, and indeed have provably been a pursuit of a will o’ the wisp because they have failed to recognize the theoretical impossibility of what they seek to accomplish. A clear and rigorous understanding of the logic underlying species definition leads both to a recognition of the inescapable ambiguity that (...) affects the definition of species, and to a framework-relative approach to species definition that is logically compelling, i.e., cannot not be accepted without inconsistency. An appendix reflects upon the conclusions reached, applying them in an intellectually whimsical taxonomic thought experiment that conjectures the possibility of an emerging new human species. (shrink)

Policies that determine whether someone is allowed access to reproductive healthcare or not vary widely among countries, especially in their age requirements. This raises the suspicion of arbitrariness, especially because often no underlying justification is provided. In this article, we pose the question—under which circumstances is it morally acceptable to use age for policy and legislation in the first place? We start from the notion that everyone has a _conditional positive_ right to fertility treatment. Subsequently, we set off to formulate (...) a framework that helps to determine who should be excluded from treatment nonetheless. The framework’s three core elements are: choosing and ethically justifying exclusion criteria (target), determining the actual limit between in- and exclusion (cut-off), and selecting variables that help to predict the exclusion criteria via correlation (as they are not directly measurable) (proxy). This framework allows us to show that referring to age in policy and legislation is only ethically justifiable if there is a sufficiently strong correlation with a non-directly measurable exclusion criterion. Moreover, since age is only one of many predicting variables, it should therefore not be ascribed any special status. Finally, our framework may be used as an argumentative scheme to critically assess the ethical legitimacy of policies that regulate access to (fertility) treatments in general. (shrink)

I first outline the standard dispositionalist account and indicate how this account has been extended from the everyday to the realm of modern physics – from vases to quarks, in effect. Here I note a fundamental obstacle: the role of symmetries as constraints on the fundamental laws in physics. One of the great virtues of the standard dispositionalist account is that it supposedly yields laws from dispositions but it remains unclear, at best, how it can accommodate such symmetry principles. I (...) then outline some ways the dispositonalist might try to do that but in effect I close off each option by indicating how the problem merely gets pushed back a step or two. Ultimately, the dispositionalist will have to ascribe her dispositions to objects that are metaphysically very ‘thin’, in the sense that they are mere placeholders within the physical structure, and also give up the standard Stimulus + Manifestation account. Of course, that will be music to the ears of certain other critics within and outwith the powers camp and I conclude by considering some recent proposals and evaluating whether they might be ‘fit for purpose’ within the context of modern physics. (shrink)

Beads and other ‘body ornaments’ are very widespread components of the archaeological record of early modern humans (Homo sapiens). They appear first in the Middle Stone Age in Africa, and somewhat later in the Early Upper Paleolithic of Eurasia. The manufacture and use of ornaments is widely considered to be evidence for significant developments in human cognition. In our view, the appearance of these objects represents the interaction of evolved cognitive capacities with changing social and demographic conditions. Body ornamentation is (...) a medium or technology for communication, particularly of socially-relevant information. The widespread adoption of beads and other discrete objects as media for communication implies changes in the complexity and stability of social messages, as well as the scale of social networks. The relatively sudden appearance of beads in the Paleolithic archaeological record coincides with genetic and archaeological evidence for expansion of human populations. We argue that these changes reflect expanding scales of social interaction and more complex social landscapes resulting from unprecedentedly large and internally differentiated human populations. (shrink)