There is nothing like an overwhelming consensus of opinion to encourage a less than rigourous approach to analyzing complex ethical issues. Unfortunately, this is nowhere more apparent than in the discussion of human reproductive cloning contained in the federal House of Representatives Standing Committee on Legal and Constitutional Affairs’ report on human cloning, released last August The report may well fulfil the first half of its project, namely the empirical task of adequately summarizing and categorizing the various submissions made to (...) the Committee. However, it is clearly inadequate as a discussion of the ethical and legal permissibility of human reproductive cloning. (shrink)

We are moral apes, a difference between humans and our relatives that has received significant recent attention in the evolutionary literature. Evolutionary accounts of morality have often been recruited in support of error theory: moral language is truth-apt, but substantive moral claims are never true. In this article, we: locate evolutionary error theory within the broader framework of the relationship between folk conceptions of a domain and our best scientific conception of that same domain; within that broader framework, argue that (...) error theory and vindication are two ends of a continuum, and that in the light of our best science, many folk conceptual structures are neither hopelessly wrong nor fully vindicated; and argue that while there is no full vindication of morality, no seamless reduction of normative facts to natural facts, nevertheless one important strand in the evolutionary history of moral thinking does support reductive naturalism—moral facts are facts about cooperation, and the conditions and practices that support or undermine it. In making our case for, we first respond to the important error theoretic argument that the appeal to moral facts is explanatorily redundant, and second, we make a positive case that true moral beliefs are a ‘fuel for success’, a map by which we steer, flexibly, in a variety of social interactions. The vindication, we stress, is at most partial: moral cognition is a complex mosaic, with a complex genealogy, and selection for truth-tracking is only one thread in that genealogy. (shrink)

In this article I develop a big picture of the evolution of human cooperation, and contrast it to an alternative based on group selection. The crucial claim is that hominin history has seen two major transitions in cooperation, and hence poses two deep puzzles about the origins and stability of cooperation. The first is the transition from great ape social lives to the lives of Pleistocene cooperative foragers; the second is the stability of the social contract through the early Holocene (...) transition to complex hierarchical societies. The first of these transitions is driven, at least initially, by individual advantage: cooperation paid off for individual foragers, initially through mutualist interaction, then through reciprocation. This argument leads to a reanalysis of the role of violence and the nature of the freeriding threat to cooperation. But the conditions that select for cooperative individuals in the Pleistocene were eroded in the Pleistocene–Holocene transition. So we need an alternative account of the survival, and indeed the expansion, of cooperation in the Holocene. Group selection driven by intercommunal conflict really may well be central to this second transition. (shrink)

If contemporary analytic philosophy can be said to have a philosophical ideology, it undoubtedly is naturalism. Naturalism is often invoked as a motivating ground for many philosophical projects, and “naturalization” programs abound everywhere, in theory of knowledge, philosophy of mind, theory of meaning, metaphysics, and ethics. But what is naturalism, and where does it come from? This paper examines the naturalism debate in midtwentieth-century America as a proximate source of contemporary naturalism. Views of philosophers like Roy Wood Sellars, John Dewey, (...) John Herman Randall, Sydney Hook, and Ernest Nagel are cited, and some of the central tenets of naturalism, such as an adherence to “scientific method” as the sole source of knowledge and the causal/ explanatory closure of the natural world, are explored. The paper ends with a brief discussion of how certain naturalistic constraints lead to some of the problems currently debated in metaethics and philosophy of mind. (shrink)

Responsible leadership is rare. It is not that most leaders are irresponsible, but responsibility in leadership is frequently defined so that an important connotation of responsible leadership is ignored. This article equates responsible leadership with virtuousness. Using this connotation implies that responsible leadership is based on three assumptions—eudaemonism, inherent value, and amplification. Secondarily, this connotation produces two important outcomes—a fixed point for coping with change, and benefits for constituencies who may never be affected otherwise. The meaning and advantages of responsible (...) leadership as virtuous leadership are discussed. (shrink)

Within paleoanthropology, the origin of behavioral modernity is a famous problem. Very large-brained hominins have lived for around half a million years, yet social lives resembling those known from the ethnographic record appeared perhaps 100,000 years ago. Why did it take 400,000 years for humans to start acting like humans? In this article, I argue that part of the solution is a transition in the economic foundations of cooperation from a relatively undemanding form, to one that imposed much more stress (...) on human motivational and cognitive mechanisms. The rich normative, ceremonial, and ideological lives of humans are a response to this economic revolution in forager lives; from one depending on immediate return mutualism to one depending on delayed and third-party reciprocation. (shrink)

This collection reports on the latest research on an increasingly pivotal issue for evolutionary biology: cooperation. The chapters are written from a variety of disciplinary perspectives and utilize research tools that range from empirical survey to conceptual modeling, reflecting the rich diversity of work in the field. They explore a wide taxonomic range, concentrating on bacteria, social insects, and, especially, humans. -/- Part I (“Agents and Environments”) investigates the connections of social cooperation in social organizations to the conditions that make (...) cooperation profitable and stable, focusing on the interactions of agent, population, and environment. Part II (“Agents and Mechanisms”) focuses on how proximate mechanisms emerge and operate in the evolutionary process and how they shape evolutionary trajectories. Throughout the book, certain themes emerge that demonstrate the ubiquity of questions regarding cooperation in evolutionary biology: the generation and division of the profits of cooperation; transitions in individuality; levels of selection, from gene to organism; and the “human cooperation explosion” that makes our own social behavior particularly puzzling from an evolutionary perspective. (shrink)

We give definitions that distinguish between two notions of indiscernibility for a set {aη∣η∈ω>ω}\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\{a_{\eta} \mid \eta \in ^{\omega>}\omega\}}$$\end{document} that saw original use in Shelah [Classification theory and the number of non-isomorphic models. North-Holland, Amsterdam, 1990], which we name s- and str−indiscernibility. Using these definitions and detailed proofs, we prove s- and str-modeling theorems and give applications of these theorems. In particular, we verify a step in the argument that TP is equivalent (...) to TP1 or TP2 that has not seen explication in the literature. In the Appendix, we exposit the proofs of Shelah [Classification theory and the number of non-isomorphic models. North-Holland, Amsterdam, 1990, App. 2.6, 2.7], expanding on the details. (shrink)

This research was focused on investigating why some consumers might support cause-related marketing campaigns for reasons other than personal benefit by examining the influence of moral emotions and cultural orientation. The authors investigated the extent to which moral emotions operate differently across a cultural variable (US versus Korea) and an individual difference variable (self-construal). A survey method was utilised. Data were collected from a convenience sample of US ( n = 180) and Korean ( n = 191) undergraduates. Moral emotions (...) significantly influenced purchase intention for a social-cause product. The influence of an ego-focused moral emotion (i.e., pride) on purchase intention was greater for US than Korean participants. The influence of another-focused moral emotion (i.e., guilt) on purchase intention was greater for high-interdependent participants than for low-interdependent participants. The findings of this research provide important and relevant implications to marketers and policy makers in developing persuasive messages and customer relationship programmes. (shrink)

Proponents of corporate environmental responsibility argue that corporations shortchange shareholders by investing too little in environmental responsibility. They claim that corporations can improve their financial performance by increasing their investment in environmental responsibility. Opponents of corporate social responsibility argue that corporations shortchange shareholders by investing too much in environmental responsibility. They claim that corporations can improve their financial performance by reducing their investment in environmental responsibility. Yet, others claim that corporations serve their shareholders well by investing just enough in social (...) responsibility, not too little and not too much. If so, corporations increase their investment in environmental responsibility when an increase improves financial performance and reduce their investment in environmental responsibility when a decrease improves financial performance. Our evidence is consistent with this last claim. We find that the behavior of corporations is consistent with the claim that they act in the interest of shareholders, increasing or decreasing their investment in environmental responsibility as necessary to improve their financial performance. (shrink)

In this article, I present a substantive proposal about the timing and nature of the final stage of the evolution of full human language, the transition from so-called “protolanguage” to language, and on the origins of a simple protolanguage with structure and displaced reference; a proposal that depends on the idea that the initial expansion of communicative powers in our lineage involved a much expanded role for gesture and mime. But though it defends a substantive proposal, the article also defends (...) and illustrates a methodological proposal too. I argue that language is a special case of a more general phenomenon—cumulative cultural evolution—and while we rarely have direct information about communication, we have more direct information about the cumulative cultural evolution of technical skill, ecological strategies, and social complexity. These same factors also enable us to make a reasonable estimate of the intergenerational social learning capacities of these communities and of the communicative demands these communities face. For example, we can, at least tentatively, identify forms of cooperation that are stable only if third party information is transmitted widely, cheaply, and accurately. So we can use these more direct markers of information accumulation to locate, in broad terms, the period in our evolutionary history during which we became lingual. (shrink)

The subsistence technology of forager communities has varied greatly over space and time. This paper (i) reviews briefly the main causal factors the literature identifies as responsible for this variation; (ii) analyzes in some detail the most prominent idea in the literature on spatial variation:Complex technology is an adaptive response to elevated risks of subsistence failure; (iii) it argues that the alleged empirical support for this hypothesis depends on dubious proxies of risk; (iv) it argues that it fails to explain (...) the subsistence technologies of desert foragers, who generally live with simple technologies in high‐risk environments; (v) it offers an alternative analysis, based on the reduced opportunity costs of complex technologies in highly seasonal environments, on the high value of typical forager targets in those environments and their relatively predictable location in space and time; and (v) the paper concludes with a conjecture about the role of environmental variation in toolkit change over deep time. (shrink)

Until relatively recently, it was often supposed that changes in the material record of hominin life indexed advances in hominin cognitive sophistication in a relatively direct way. In particular, the “Upper Paleolithic Transition”—an apparently abrupt increase in the complexity and disparity of our material culture—was thought to signal the arrival of the fully human mind. While the idea of a direct relationship between material complexity and cognitive sophistication still has some defenders, this view has largely been abandoned. It is now (...) widely appreciated that aspects of ancient hominins’ demographic and social organization have a powerful influence both on the material culture they need and the material culture they can sustain. But if this more nuanced view is right, what does the deep material record tell us about the evolution of hominin cognition? I explore that question in this article. (shrink)

This paper begins by calling attention to a puzzling feature of our deep past: an apparent mis-match between morphological evolution in our lineage, including the expansion of our brain and neocortex, and changes in material culture. Three ideas might explain this mis-match. The apparent mis-match is an illusion: change in material culture is indeed driven by biological evolution, but of a kind difficult to identify in the fossil record; the mismatch is caused by the fact that material culture is sensitive (...) to the social and demographic environment, not just the native cognitive capacities of individual agents. Innovation and its uptake is more reliable in larger social worlds. The mis-match is made possible by adaptive phenotypic plasticity; in particular, cognitive plasticity. Just as material culture evolves through cumulative cultural learning, so too do cognitive skills, including ones which make innovations in, and the transmission of, material culture more efficient. This paper is targeted on the second of these ideas, and distinguishes three different versions of the view that increases in social scale support increases in the complexity of material culture. Those are: cultural selection is more efficient in larger social worlds; larger social worlds support more specialisation, which in turn supports a more complex material culture; cultural learning is more efficient in larger social worlds. The paper argues that the first two of these pathways are probably more important than the third in explaining otherwise puzzling features of the archaeological and ethnographic record. (shrink)

This paper has two aims. One is to defend an incrementalist view of the evolution of language, not from those who think that syntax could not evolve incrementally, but from those who defend a fundamental distinction between Gricean communication or ostensive inferential communication and code-based communication. The paper argues against this dichotomy, and sketches ways in which a code-based system could evolve into Gricean communication. The second is to assess the merits of the Sender–Receiver Framework, originally formulated by David Lewis, (...) and much elaborated and set into an evolutionary context by Brian Skyrms and colleagues, as a framework for thinking about the evolution of language. Despite the great strengths of that framework, and despite the great value of a framework that is both general and formally tractable, I argue that there are critical features of language that it fails to capture. (shrink)

This book assesses the real differences between the two conceptions of evolution.

Debates on the contingency of history have largely focused on the history of life. This article targets the supposed contingency of human history. It does not defend a global claim about the overall contingency of history. Rather, it aims to identify and explain the difference between robust and fragile historical trajectories. It does so by considering a set of contrasting cases and identifying critical differences among the cases. The analysis shows that one important source of contingency is the historical emergence (...) of command-and-control institutions; one important source of robustness is the existence of population-level processes structured by relatively stable institutions. (shrink)

In his profound discussion, Sterelny draws out common themes in the contributions to this topic: selective drivers in the coevolution of cognition and culture, the role of language in it, characteristics of cumulative cultural evolution, and issues of testability. He highlights the growing body of evidence for positive feedback mechanisms in cultural evolution, but also notes that progress is piecemeal, calling for more cross‐border work between cognitive science and research on cultural evolution.

This study viewed students majoring in public relations as prospective public relations practitioners and explored their perceptions about corporate social responsibility (CSR) as their job attraction condition. The results showed that the students perceived CSR to be an important ethical fit condition of a company. One of the significant findings is that CSR can be an effective reputation management strategy for prospective employees, particularly when a company’s business is suffering. In examining the effect of CSR efforts on attitudinal and behavioral (...) outcomes, person–organization (P–O) fit appeared to serve as a mediator between CSR performances and organizational attractiveness. (shrink)

This study examines the dimensional consequences of having positive prior corporate associations and negative prior corporate associations in times of product-harm crisis by applying two dimensions of corporate associations. The findings indicate that the disadvantages of having negative prior corporate ability associations are bigger than having negative corporate social responsibility associations in times of product-harm crisis, whereas the advantages of having positive prior CSR associations are bigger than having positive CA associations. This study also provides directions for how to manage (...) reputational strengths and weaknesses prior to a crisis as part of reputation and crisis management. (shrink)

Hutto and Satne identify three research traditions attempting to explain the place of intentional agency in a wholly natural world: naturalistic reduction; sophisticated behaviourism, and pragmatism, and suggest that insights from all three are necessary. While agreeing with that general approach, I develop a somewhat different package, offering an outline of a vindicating genealogy of our interpretative practices. I suggest that these practices had their original foundation in the elaboration of much more complex representation-guided control structures in our lineage and (...) the support and amplification of those control structures through external resources. Cranes became increasingly important in the explanation of systematically successful action. These more complex representational engines coevolved with selection to detect and respond to the control structures of others. Since much of that selection was driven by the advantages of cooperation and coordination, in part these control structures were co-opted as external signals and guarantees, in cooperation and coordination. As the time depth of cooperation and co-ordination extended, these public signals of belief and intent acquired secondary functions, as mechanisms to stabilise and structure control systems, making humans not just more transparent to one another at a time, but more predictable over time. Mindshaping, not just mindreading, became increasingly important in our lineage. (shrink)

This paper responds to Birch and Buskell's thoughtful critique. In it, I defend my use of behavioural ecology. I argue, contra Birch and Buskell, that I can give a principled defence of the emergence of conventions for respecting property, modelling as a network of pairwise iterated PDs between incipient farmers. Second, I defend my scepticism about the power of cultural group selection to optimise community normative packages. Finally, I located my views, as requested, against those of The dawn of everything. (...) I argue that the more complex “original position” envisaged in Dawn depends on special conditions rarely found on Pleistocene Africa. (shrink)

In the U.S. there has been considerable interest in connecting low-income households to alternative food networks like Community Supported Agriculture. To learn more about this possibility we conducted a statewide survey of CSA members in California. A total of 1149 members from 41 CSAs responded. Here we answer the research question: How do CSA members’ socioeconomic and demographic backgrounds, household conditions potentially interfering with membership, and CSA membership experiences vary between lower-income households and higher-income households? We divided members into LIHHs (...) and HIHHs. We present comparisons of LIHHs’ and HIHHs’ employment, race/ethnicity, household composition and education, use of food support, and enjoyment of food-related activities; conditions interfering with membership and major life events; and sources of information influencing decision to join, reasons for joining, ratings of importance of and satisfaction with various CSA attributes, gaps between importance of and satisfaction with various CSA attributes, valuing of the share and willingness to pay more, and impacts of membership. We find that LIHHs are committed CSA members, often more so than HIHHs, and that CSA members in California are disproportionately white, but that racial disproportionality decreases as incomes increase. We conclude by considering: the economic risks that LIHHs face in CSA membership, the intersection of economic risks with race/ethnicity and cultural coding in CSA; and the possibilities of increasing participation of LIHH in CSA. (shrink)

How can we have a sense of the presence of ordinary three-dimensional objects (e.g., an apple on my desk, a partially occluded cat behind a picket fence) when we are only presented with some parts of objects perceived from a particular egocentric viewpoint (e.g., the facing side of the apple, the unoccluded parts of the cat)? This paper presents and defends a novel answer to this question by incorporating insights from two prominent contemporary theories of perception, naïve realism and sensorimotor (...) theory. Naïve realism is the view that perception is fundamentally a matter of obtaining a relation of ‘acquaintance’ with some mind-independent entities (e.g., objects, properties, events). Sensorimotor theory holds that perception involves implicit practical understanding or ‘anticipation’ of the covariance between movements and sensory changes. I argue that perceptual presence is best accounted for in terms of the combination of our direct ‘acquaintance’ with some parts of perceived objects and sensorimotor ‘anticipations’ of how the objects would look different depending on some movements and actions. (shrink)

The articles in this issue represent the pursuit of a new understanding of the human past, one that can replace the neo-saltationist view of a human revolution with models that can account for the complexities of the archaeological record and of human social lives. The articulation of archaeological, philosophical, and biological perspectives seems to offer a strong foundation for exploring available evidence, and this was the rationale for collecting these particular articles. Even at this preliminary stage there is a coherence (...) emerging in proposals: the origin and operation of symbolically rich, complexly signaling human social systems was the consequence of the long-term evolution of multiple components of perceiving and negotiating social interactions, a contingent outcome of myriad adaptive shifts rather than a single event. (shrink)

Considering questions at the intersection of time and fiction deepens our understanding of fiction, introduces new questions for philosophy of time, and brings analytic philosophy in discussion with narratology. Philosophers debate whether fictional time can be tensed, whether fictional time can branch, repeat, pause, rewind, or skip and whether fictional time travel is possible. Much of the way we answer these questions will depend on our overall commitment to the nature of fiction. It’s also unclear what, if anything, we can (...) learn about the metaphysics of time from fiction. This chapter will introduce readers to discussions that are shaping the debates in this domain. (shrink)

We study generalized amalgamation properties in simple theories. We formulate a notion of generalized amalgamation in such a way so that the properties are preserved when we pass from T to Teq or Theq; we provide several equivalent ways of formulating the notion of generalized amalgamation.We define two distinct hierarchies of simple theories characterized by their amalgamation properties; examples are given to show the difference between the hierarchies.

The issue of human nature or xing 性 was a major philosophical topic of the mid- and late-Warring States period of ancient China. It was famously discussed, for example, in the Mencius. Zhuangzi 莊子 lived around the same time as Mencius and one might expect that he, too, would have discussed it. Surprisingly, the term xing is absent from the Inner Chapters of the Zhuangzi. There have been different responses to this, namely, that Zhuangzi: used different terms equivalent to xing; (...) believed that human nature is bad (despite not mentioning xing); was deliberately silent on xing as an oblique way of criticizing others such as Mencius. I review these claims and provide an analysis of how xing was mainly conceptualized during the Warring States period in essentialist terms. I shall read Zhuangzi’s philosophy as transcending this conceptual framework. Instead of a theory of human nature, Zhuangzi provides stories and descriptions of the different facets of human behavior and their psychological and other complexities. These often have an epistemic focus that stand independently of any theory of human nature. (shrink)

What do events such as scandals, industrial accidents, activist threats, and mass shootings have in common? They can all trigger an audience’s stigma judgment about the organization involved in the event. Despite the prevalence of these stigma-triggering events, management research has provided little conceptual work to characterize the dimensions and processes of organizational event stigma. This article takes the perspective of the evaluating audience to unpack the stigma judgment process, identify critical dimensions for categorizing types of event stigma, and explore (...) the role of the stigmatizers’ aesthetic, emotional, and cognitive reactions as well as their practical considerations in producing what we call “sticky stigmas.” Our event stigma typology provides clarity regarding how stigmas differ based on the types of events and audiences’ reactions and why some event stigmas are stronger and more long-lasting than others. We highlight the role of emotions and aesthetics in stigma formation and the various ethical dilemmas that influence stigma stickiness. (shrink)

Individuals’ beliefs about the malleability of emotions have been theorised to play a role in their psychological distress by influencing emotion regulation processes, such as the use of emotion regulation strategies. We conducted a meta-analysis to test this idea across studies with a focus on the relationships between emotion malleability beliefs and five distinct emotion regulation strategies: cognitive reappraisal, suppression, avoidance, rumination, and acceptance. Further, using two-stage meta-analytic structural equation modelling (TSSEM), we examined whether the emotion regulation strategies mediate the (...) cross-sectional relationship between emotion malleability beliefs and psychological distress across studies. Thirty-seven studies were included in the meta-analyses and 55 cross-sectional studies were included in the TSSEM. Results demonstrated that, across studies, emotion malleability beliefs were significantly associated with greater use of putatively helpful strategies (particularly with cognitive reappraisal) and less use of putatively unhelpful strategies (particularly with avoidance). The use of cognitive reappraisal and avoidance partially mediated the relationship between emotion malleability beliefs and psychological distress. These results highlight the importance of considering beliefs about the malleability of emotions in the context of emotion regulation. These findings suggest the potential role of emotion malleability beliefs in interventions for individuals with emotion regulation-related difficulties and psychological distress. (shrink)

The Hwang affair, a dramatic and far reaching instance of scientific fraud, shocked the world. This collective national failure prompted various organizations in Korea, including universities, regulatory agencies, and research associations, to engage in self-criticism and research ethics reforms. This paper aims, first, to document and review research misconduct perpetrated by Hwang and members of his research team, with particular attention to the agencies that failed to regulate and then supervise Hwang’s research. The paper then examines the research ethics reforms (...) introduced in the wake of this international scandal. After reviewing American and European research governance structures and policies, policy makers developed a mixed model mindful of its Korean context. The third part of the paper examines how research ethics reform is proactive (a response to shocking scientific misconduct and ensuing external criticism from the press and society) as well as reactive (identification of and adherence to national or international ethics standards). The last part deals with Korean society’s response to the Hwang affair, which had the effect of a moral atomic bomb and has led to broad ethical reform in Korean society. We conceptualize this change as ethical modernization, through which the Korean public corrects the failures of a growth-oriented economic model for social progress, and attempts to create a more trustworthy and ethical society. (shrink)

The concept of the cheng xin in the Zhuangzi claims that the cognitive function of the heart-mind is not over and above its affective states and in charge of them in developing and controlling virtue, as assumed by the Confucians and others. This joint cognitive and affective nature of the heart-mind denies ethical and epistemic certainty. Individual perspectives are limited given habits of thought, attitudes, personal orientations and particular cognitive/affective experiences. Nevertheless, the heart-mind has a vast imaginative capacity that allows (...) the open-endedness and broadening of perspectives. (shrink)

An incoherent feed‐forward loop (FFL) is one of the most‐frequently observed motifs in biomolecular regulatory networks. It has been thought that the incoherent FFL is designed simply to induce a transient response shaped by a ‘fast activation and delayed inhibition’. We find that the dynamics of various incoherent FFLs can be further classified into two types: time‐dependent biphasic responses and dose‐dependent biphasic responses. Why do the structurally identical incoherent FFLs play such different dynamical roles? Through computational studies, we show that (...) the dynamics of the two types of incoherent FFLs are mutually exclusive. Following from further computational results and experimental observations, we hypothesize that incoherent FFLs have been optimally designed to achieve distinct biological function arising from different cellular contexts. Additional Supporting Information may be found in the online version of the article. BioEssays 30:1204–1211, 2008. © 2008 Wiley Periodicals, Inc. (shrink)

The use of ethnography to understand archaeology is both prevalent and controversial. This paper develops an alternative approach, using ethnography to build and test a general theory of forager behaviors, and their variations in different conditions, one which can then be applied even to prehistoric sites differing from contemporary experience. Human behavioral ecology is chosen as the framework theory, and forager social learning as a case study. The argument is then applied to social learning in the late Pleistocene, and hence (...) to a famous archaeological puzzle: the late Pleistocene acceleration of technical innovation and regional differentiation. (shrink)

A Darwinian theory of the evolution of language must be incremental: to explain the transition from a hominin baseline with great ape grade communicative capacities to language-equipped hominins as a series of small steps. This paper takes up that project for the special case of words, giving an incremental model of the call to word transition. The model is embedded in a general conception of human social evolution with independent empirical support, but it also depends on some more specific assumptions (...) about language and about the earlier forms of hominin communication. Given these assumptions, the paper can be no more than a working draft of a more complete theory. (shrink)