Robert Boyd*†, Herbert Gintis‡, Samuel Bowles§, and Peter J. Richerson¶.

Robert Boyd*†, Herbert Gintis‡, Samuel Bowles§, and Peter J. Richerson¶.

A simple and general criterion is derived for the evolution of altruism when individuals interact in pairs. It is argued that the treatment of this problem in kin selection theory and in game theory are special cases of this general criterion.

The significance of scientific research into the evolution of altruism for environmental ethics can be highlighted through an analysis of recent debates over William Hamilton’s theory of inclusive fitness. Recent debates over how to explain altruism have become particularly charged with ideological weight because they are seen to have some consequence for how we understand the human moral project, especially with regard to nonhuman life. By analyzing the place of evolutionary theory in the work of environmental ethicists (...) some conclusions can be drawn about the extent to which these debates, and evolutionary research into behavior more generally, are and are not significant for environmental ethics. In particular, the most important issues at stake for environmental ethicists concern the conditions under which altruistic forms of behavior can thrive and the degree to which we can consider intensive forms of altruism to be unstable and anomalous, or rather stable and predictable outcomes of social evolution given favorable conditions. (shrink)

Each generation of evolutionary biologists has brought a fresh wave of attempts to answer the evolutionary riddle of altruism. However, none describe how such a condition could incrementally evolve from a prior condition of non-cooperation. This chapter describes a mechanism that could spontaneously and incrementally give rise to a synergistic codependence among individuals within a social group. It shows that prolonged social living in the absence of reproductive cost can mask selection-maintaining traits important for autonomous living, causing them to (...) drift and degrade to the point where individuals can no longer succeed outside the social context. This ‘social addiction’ will subsequently favour traits that maintain social cohesion because of the high cost of group dispersion. This mechanism contributes a missing complementary component to existing selection-based explanations of the evolution of pro-social and altruistic behaviours. (shrink)

In what follows, I critique the interpretation that Sober and Wilson offer of their group selection model in Unto Others. Sober and Wilson mistakenly claim that their model operates as an example of Simpson's paradox and defend an interpretation of their model according to which groups are operated upon by natural selection. In the place of their interpretation, I offer one that parallels the mathematical calculation of the model's outcome and does not depend on the postulation of a force of (...) group selection or a value for group fitness. (shrink)

In their recent book, Elliott Sober and David Wilson (1998) argue that evolutionary biologists have wrongly regarded kinship as the exclusive means by which altruistic behavior can evolve, at the expense of other mechanisms. I argue that Sober and Wilson overlook certain genetical considerations which suggest that kinship is likely to be a more powerful means for generating complex altruistic adaptations than the alternative mechanisms they propose.

Altruism is one of the most studied topics in theoretical evolutionary biology. The debate surrounding the evolution of altruism has generally focused on the conditions under which altruism can evolve and whether it is better explained by kin selection or multilevel selection. This debate has occupied the forefront of the stage and left behind a number of equally important questions. One of them, which is the subject of this article, is whether the word “selection” in “kin (...) selection” and “multilevel selection” necessarily refers to “evolution by natural selection.” I show, using a simple individual-centered model, that once clear conditions for natural selection and altruism are specified, one can distinguish two kinds of evolution of altruism, only one of which corresponds to the evolution of altruism by natural selection, the other resulting from other evolutionary processes. (shrink)

Darwin's inner voice -- Living the virtuous life -- Of altruism and free riders -- Knowing our immediate predecessors -- Resurrecting some venerable ancestors -- A natural Garden of Eden -- The positive side of social selection -- Learning morals across the generations -- Work of the moral majority -- Pleistocene ups, downs, and crashes -- Testing the selection-by-reputation hypothesis -- The evolution of morals -- Epilogue: humanity's moral future.

Numerous studies show that humans tend to be more cooperative than expected given the assumption that they are rational maximizers of personal gain. As a result, theoreticians have proposed elaborated formal representations of human decision-making, in which utility functions including “altruistic” or “moral” preferences replace the purely self-oriented "Homo economicus" function. Here we review mathematical approaches that provide insights into the mathematical stability of alternative ways of representing human decision-making in social contexts. Candidate utility functions may be evaluated with help (...) of game theory, classical modeling of social evolution that focuses on behavioral strategies, and modeling of social evolution that focuses directly on utility functions. We present the advantages of the latter form of investigation and discuss one surprisingly precise result: “Homo economicus” as well as “altruistic” utility functions are less stable than a function containing a preference for the golden rule or for the common welfare that is only expressed in social contexts composed of individuals with similar preferences. We discuss the contribution of mathematical models to our understanding of human other-oriented behavior, with a focus on the classical debate over psychological altruism. We conclude that human can be psychologically altruistic, but that psychological altruism evolved because it was generally expressed towards individuals that contributed to the actor’s fitness, such as own children, romantic partners and long term reciprocators. (shrink)

While prior models of the evolution of altruism have assumed that organisms reproduce asexually, this paper presents a model of the evolution of altruism for sexually reproducing organisms using Hardy–Weinberg dynamics. In this model, the presence of reciprocal altruists allows the population to evolve to a stable polymorphic population where the majority of organisms are altruistic. Further, adding stochasticity leads to even larger numbers of altruists, while adding stochasticity to an analogous asexual model leads to more (...) selfish organisms. The contrast between these outcomes demonstrates why it may be important to pay attention to the underlying genetics of a population. (shrink)

My aim in this paper is to demonstrate that a very simple learning rule based on imitation can help to sustain altruism as a culturally transmitted pattern or behaviour among agents playing a standard prisoner’s dilemma game. The point of this demonstration is not to prove that imitation is single-handedly responsible for existing levels of altruism (a thesis that is false), nor is the point to show that imitation is an important factor in explanations for the evolution (...) of altruism (a thesis already prominent in the existing literature). The point is to show that imitation contributes to the evolution of altruism in a particular way that is not always fairly represented by evolutionary game theory models. Specifically, the paper uses a simple model to illustrate that cultural transmission includes mechanisms that do not transmit phenotype vertically (i.e. from parent to related offspring) and that these mechanisms can promote altruism in the absence of any direct biological propensity favouring such behaviour. This is a noteworthy result because it shows that evolutionary models can be built to explicitly reflect the contribution of non-vertical transmission in our explanations for the evolution of altruism among humans and other social species. (shrink)

Altruism is a central concept in evolutionary biology. Evolutionary biologists still disagree about its meaning (E.O. Wilson 2005; Fletcher et al. 2006; D.S. Wilson 2008; Foster et al. 2006a, b; West et al. 2007a, 2008). Semantic disagreement appears to be quite robust and not easily overcome by attempts at clarification, suggesting that substantive conceptual issues lurk in the background. Briefly, group selection theorists define altruism as any trait that makes altruists losers to selfish traits within groups, and makes (...) groups of altruists fitter than groups of non-altruists. Inclusive fitness theorists reject a definition based on within- and between-group fitness. Traits are altruistic only if they cause a direct and absolute fitness loss to the donor. The latter definition is more restrictive and rejects as cases of altruism behaviors that are accepted by the former. Fletcher and Doebeli (2009) recently proposed a simple, direct and individually based fitness approach, which they claim returns to first principles: carriers of the genotype of interest “must, on average, end up with more net direct fitness benefits than average population members.” This seductively simple proposal uses the concept of assortment to explain how diverse kinds of altruists end up on average with more net fitness than their non-altruistic rivals. In this paper I shall argue that their approach implies a new concept of altruism that contrasts with and improves on the concept of the inclusive fitness approach. (shrink)

We argue that there are two different kinds of altruistic motivation: classical psychological altruism, which generates ultimate desires to help other organisms at least partly for those organisms’ sake, and nonclassical psychological altruism, which generates ultimate desires to help other organisms for the sake of the organism providing the help. We then argue that classical psychological altruism is adaptive if the desire to help others is intergenerationally reliable and, thus, need not be learned. Nonclassical psychological altruism (...) is adaptive when the desire to help others is adaptively learnable. This theory opens new avenues for the interdisciplinary study of psychological altruism. (shrink)

Genuine altruism would appear to be incompatible with evolutionary theory. And yet altruistic behavior would seem to occur, at least on occasion. This article first considers a game-theoretical attempt at solving this seeming paradox, before considering agroup selectionist approach. Neither approach, as they stand, would seem to render genuine, as opposed to reciprocal, altruism compatible with the theory of evolution. The article concludes by offering an alternative game-theoretical solution to the problem of altruism.

The phenomenon of altruism extends from the biological realm to the human sociocultural realm. This article sketches a coherent outline of multiple types of altruism of progressively increasing scope that span these two realms and are grounded in an ever-expanding sense of “self.” Discussion of this framework notes difficulties associated with altruism at different levels. It links scientific ideas about the evolution of cooperation and about hierarchical order to perennial philosophical and religious concerns. It offers a (...) conceptual background for inquiry into societal challenges that call for altruistic behavior, especially the challenge of environmental and social sustainability. (shrink)

One version of pluralism was defended in a well-known paper by Sterelny and Kitcher. In this sense, pluralism is the view that any given selective process can be described at a variety of different levels in the biological hierarchy. On Sterelny and Kitcher’s view, one can explain giraffe necks in terms of competition among longer-necked and shorter-necked giraffes, and one can also explain them in terms of competition among the genes that lead to these differences in neck size. Although these (...) descriptions might have different heuristic virtues, neither description has a special explanatory status that the other lacks. (shrink)

'Altruism' was coined by the French sociologist Auguste Comte in the early 1850s as a theoretical term in his 'cerebral theory' and as the central ideal of his atheistic 'Religion of Humanity'. In The Invention of Altruism, Thomas Dixon traces this new language of 'altruism' as it spread through British culture between the 1850s and the 1900s, and in doing so provides a new portrait of Victorian moral thought. Drawing attention to the importance of Comtean positivism in (...) setting the agenda for debates about science and religion, this volume challenges received ideas about both Charles Darwin and Herbert Spencer as moral philosophers. Darwin saw sympathy and love, not only selfishness and competition, throughout the natural world. Spencer was the instigator of an Anti-Aggression League and an advocate of greater altruism in Britain's dealings with the 'lower races'. It also sheds light on the rise of popular socialism in the 1880s, on the creation of the idealist 'altruist' in novels of the 1890s, and on the individualistic philosophies of Friedrich Nietzsche, Oscar Wilde, and G. E. Moore - authors considered by some to be representative of fin de siècle 'egomania.' This wide-ranging study in the history of ideas is highly relevant to contemporary debates about altruism, evolution, religion, and ethics. (shrink)

Extraterrestrial Altruism examines a basic assumption of the Search for Extraterrestrial Intelligence (SETI): that extraterrestrials will be transmitting messages to us for our benefit. This question of whether extraterrestrials will be altruistic has become increasingly important in recent years as SETI scientists have begun contemplating transmissions from Earth to make contact. Technological civilizations that transmit signals for the benefit of others, but with no immediate gain for themselves, certainly seem to be altruistic. But does this make biological sense? Should (...) we expect altruism to evolve throughout the cosmos, or is this only wishful thinking? Is it dangerous to send messages to other worlds, as Stephen Hawking has suggested, or might humankind benefit from an exchange with intelligence elsewhere in the galaxy? Would extraterrestrial societies be based on different ethical principles, or would we see commonalities with Earthly notions of morality? Extraterrestrial Altruism explores these and related questions about the motivations of civilizations beyond Earth, providing new insights that are critical for SETI. Chapters are authored by leading scholars from diverse disciplines—anthropology, astronomy, biology, chemistry, computer science, cosmology, engineering, history of science, law, philosophy, psychology, public policy, and sociology. The book is carefully edited by Douglas Vakoch, Director of Interstellar Message Composition at the SETI Institute and professor of clinical psychology at the California Institute of Integral Studies. The Foreword is by Frank Drake. This interdisciplinary book will benefit everybody trying to understand whether evolution and ethics are unique to Earth, or whether they are built into the fabric of the universe. (shrink)

Human behavior regarding medicine seems strange; assumptions and models that seem workable in other areas seem less so in medicine. Perhaps we need to rethink the basics. Toward this end, I have collected many puzzling stylized facts about behavior regarding medicine, and have sought a small number of simple assumptions which might together account for as many puzzles as possible.

In The Evolution of Moral Progress Allen Buchanan and Russell Powell advance an evolutionary explanation of moral progress by morality becoming more ‘inclusivist’. We are prepared to accept this explanation as far as it goes, but argue that it fails to explain how morality can become inclusivist in the fuller sense they intend. In fact, it even rules out inclusivism in their intended sense of moral progress, since they believe that human altruism and prosocial attitudes are essentially parochial. (...) We also respond to their charge that the possibility of moral enhancement by biomedical means that we have defended in numerous publications assumes that moral attitudes are biologically hard‐wired to an extent that implies that they are resilient to the influence of cognitive or cultural factors. Quite the contrary, we think they are more open to such influence than they seem to do. (shrink)

Conspicuous consumption associated with status reinforcement behavior can be explained in terms of costly signaling, or strategic handicap theory, first articulated by Zahavi and later formalized by Grafen. A theory is introduced which suggests that the evolutionary raison d’être of status reinforcement behavior lies not only in its effects on lifetime reproductive success, but in its positive effects on the probability of survival through infrequent, unpredictable demographic bottlenecks. Under some circumstances, such “wasteful” displays may take the form of displays of (...) altruistic behavior and generosity on the part of high status individuals, in that is signals the ability to bear the short-term costs of being generous or “cooperative,” while at the same time reinforcing the long-term benefits of higher status. (shrink)

Recent research on the evolution of religion has focused on whether religion is an unselected by-product of evolutionary processes or if it is instead an adaptation by natural selection. Adaptive hypotheses for religion include direct fitness benefits from improved health and indirect fitness benefits mediated by costly signals and/or cultural group selection. Herein, I propose that religious denominations achieve indirect fitness gains for members through the use of ecologically arbitrary beliefs, rituals, and moral rules that function as recognition markers (...) of cultural inheritance analogous to kin and species recognition of genetic inheritance in biology. This recognition signal hypotheses could act in concert with either costly signaling or cultural group selection to produce evolutionarily altruistic behaviors within denominations. Using a cultural phylogenetic analysis, I show that a large set of religious behaviors among extant Christian denominations supports the prediction of the recognition signal hypothesis that characters change more frequently near historical schisms. By incorporating demographic data into the model, I show that more-distinctive denominations, as measured through dissimilar characteristics, appear to be protected from intrusion by nonmembers in mixed-denomination households, and that they may be experiencing greater biological growth of their populations even in the present day. (shrink)

The evolution of altruism in human societies has been intensively investigated in social and natural sciences. A widely acknowledged recent idea is the “parochial altruism model,” which suggests that inter- group hostility and intragroup altruism can coevolve through lethal intergroup conflicts. The current article critically examines this idea by reviewing research relevant to intergroup conflicts in human evolutionary history from evolutionary biology, psychology, cultural anthropology, and archaeology. After a brief intro- duction, section 2 illustrates the mathematical (...) model of parochial altruism and some critiques of the model and its interpretation, primarily from an evolutionary biology point of view. Section 3 delves into the archaeological evidence of prehistoric intergroup conflicts in the Japanese archipelago’s Jomon and Yayoi periods, Europe’s Mesolithic period, and North America’s Pacific period as counter examples of the paro- chial altruism model. In section 4, the ethnographies of intergroup relationships and conflicts reveal that intergroup relationships in many ethnic groups are not as simple as the assumption in the mathematical model of parochial altruism. In section 5, we outline psychological research on intergroup conflicts which suggest that intergroup hostility and ingroup altruism are not necessarily correlated. In conclusion, we argue that the assumption and parameter settings of the parochial altruism model are inconsistent with empirical data. (shrink)

This chapter contains sections titled: Setting the Task The Moral Brain The First Layer: Kin Selection The Second Layer: Reciprocal Altruism A Third Layer: Indirect Reciprocity A Fourth Layer: Cultural Group Selection A Fifth Layer: The Moral Emotions Conclusion: From Moral Grammar to Moral Systems.

Kin selection, reciprocity and group selection are widely regarded as evolutionary mechanisms capable of sustaining altruism among humans andother cooperative species. Our research indicates, however, that these mechanisms are only particular examples of a broader set of evolutionary possibilities.In this paper we present the results of a series of simple replicator simulations, run on variations of the 2–player prisoner's dilemma, designed to illustrate the wide range of scenarios under which altruism proves to be robust under evolutionary pressures. The (...) set of mechanisms we explore is divided into four categories :correlation, group selection, imitation, and punishment. We argue that correlation is the core phenomenon at work in all four categories. (shrink)

Here we propose a new theory for the origins and evolution of human warfare as a complex social phenomenon involving several behavioral traits, including aggression, risk taking, male bonding, ingroup altruism, outgroup xenophobia, dominance and subordination, and territoriality, all of which are encoded in the human genome. Among the family of great apes only chimpanzees and humans engage in war; consequently, warfare emerged in their immediate common ancestor that lived in patrilocal groups who fought one another for females. (...) The reasons for warfare changed when the common ancestor females began to immigrate into the groups of their choice, and again, during the agricultural revolution. (shrink)

Evolutionary explanations of altruism and human cooperation, first set forth by pioneers such as Darwin, Hamilton and Trivers, suggest that biology might be capable of offering a plausible scientific explanation of the core of human morality. According to this project, morality and human cooperation arise when resourcesare scarce; they cannot be exploited by isolated individuals; and individuals cannot maintain a long-term position of domination over others in order to advance their selfish ends. An important philosophical question that arises with (...) respect to this project has to do with the concepts of de morality and moral motivation that itpresupposes. The evolutionary project has not been clear in this respect. The article argues in favor of two theses: 1) evolutionary explanations of cooperation suggest a contractual type of morality, but they are ambiguous regarding the motivations favored by natural selection, thus reflecting, without resolving it, a traditionaldisagreement between Hobbes’s moral contractualism (selfish motivations) and that of Kant (altruistic motivations); 2) in their current form, these explanations cannot resolve that disagreement, but a reflection on the role of the capacity to interpret the motivations and character of others in the evolution of morality could provide arguments in favor of Kantian contractualism. (shrink)

Introduction, W G Runciman Social Evolution in Primates: The Role of Ecological Factors and Male Behaviour, Carel P van Schaik Determinants of Group Size in Primates: A General Model, R I M Dunbar Function and Intention in the Calls of Non-Human Primates, Dorothy L Cheney & Robert M Seyfarth Why Culture is Common, but Cultural Evolution is Rare, Robert Boyd & Peter J Richerson An Evolutionary and Chronological Framework for Human Social Behaviour, Robert A Foley Friendship and the (...) Banker?s Paradox: Other Pathways to the Evolution of Adaptations for Altruism, John Tooby & Leda Cosmides The Early Prehistory of Human Social Behaviour: Issues of Archaeological Inference and Cognitive Evolution, Steven Mithen The Emergence of Biologically Modern Populations in Europe: A Social and Cognitive ?Revolution??, Paul Mellars Responses to Environmental Novelty: Changes in Men?s Marriage Strategies in a Rural Kenyan Community, Monique Borgerhoff Mulder Genetic Language Impairment: Unruly Grammars, M Gopnik, J Dalalakis, S E Fukuda, S Fukuda & E Kehayia The Emergence of Cultures among Wild Chimpanzees, Christophe Boesch Terrestriality, Bipedalism and the Origin of Language, Leslie C Aiello Conclusions, John Maynard Smith. (shrink)

Many of the most important properties of human groups – including properties that may give one group an evolutionary advantage over another – are properly defined only at the level of group organization. Yet at present, most work on the evolution of culture has focused solely on the transmission of individual-level traits. I propose a conceptual extension of the theory of cultural evolution, particularly related to the evolutionary competition between cultural groups. The key concept in this extension is (...) the emergent group-level trait. This type of trait is characterized by the structured organization of differentiated individuals and constitutes a unit of selection that is qualitatively different from selection on groups as defined by traditional multilevel selection theory. As a corollary, I argue that the traditional focus on cooperation as the defining feature of human societies has missed an essential feature of cooperative groups. Traditional models of cooperation assume that interacting with one cooperator is equivalent to interacting with any other. However, human groups involve differential roles, meaning that receiving aid from one individual is often preferred to receiving aid from another. In this target article, I discuss the emergence and evolution of group-level traits and the implications for the theory of cultural evolution, including ramifications for the evolution of human cooperation, technology, and cultural institutions, and for the equivalency of multilevel selection and inclusive fitness approaches. (shrink)

Species evolve, very slowly, through selection of genes which give rise to phenotypes well adapted to their environments. The cultures, including the languages, of human communities evolve, much faster, maintaining at least a minimum level of adaptedness to the external, non- cultural environment. In the phylogenetic evolution of species, the transmission of information across generations is via copying of molecules, and innovation is by mutation and sexual recombination. In cultural evolution, the transmission of information across generations is by (...) learning, and innovation is by sporadic invention or borrowing from other cultures. This much is the foundational bedrock of evolutionary theory. But things get more complicated; there can be gene-culture co-evolution. Prior to the rise of culture, the physical environment is the only force shaping biological evolution from outside the organism, and cultures themselves are clearly constrained by the evolved biological characteristics of their members. But cultures become part of the external environment, and influence the course of biological evolution. For example, altruistic cultures with developed medical knowledge reduce the cost to the individual of carrying genes disposing to certain pathologies (such as diabetes); and such genes become more widespread in the populations maintaining such cultures. Assortative mating can affect biological evolution, and particular cultures may influence the factors which are sorted for in mating. (For a careful discussion of the effects of cultural evolution on natural selection, see Cavalli-Sforza and Bodmer, 1971:774- 804). This paper examines mechanisms involved in the co-evolution of a biological trait, the critical period for language acquisition, and a property of human cultures, the size of their languages. A gene/culture interaction will be shown that can be described as a kind of symbiosis, but perhaps more aptly as an `arms race'. In this introduction, we will sketch the basic mechanics of the interaction in very broad terms; the rest of the paper will explain and justify the details. The implications of our model for second language acquisition are given toward the end of the paper. (shrink)

While many philosophers agree that evolutionary theory has important implications for the study of ethics, there has been no consensus on what these implications are. I argue that we can better understand these implications by examining two related yet distinct issues in evolutionary theory: the evolution of our moral beliefs and the evolution of cooperative behavior. While the prevailing evolutionary account of morality poses a threat to moral realism, a plausible model of how altruism evolved in human (...) beings provides the grounding for a research program that focuses on achieving some of the more practical goals shared by ethicists. †To contact the author, please write to: Department of Political Science, Economics, and Philosophy, College of Staten Island/City University of New York, 2800 Victory Blvd., Staten Island, NY 10314; e‐mail: [email protected]. (shrink)

In the scientific literature on religious evolution, two competing theories appeal to group selection to explain the relationship between religious belief and altruism, or costly, prosocial behavior. Both theories agree that group selection plays an important role in cultural evolution, affecting psychological traits that individuals acquire through social learning. They disagree, however, about whether group selection has also played a role in genetic evolution, affecting traits that are inherited genetically. Recently, Jonathan Haidt has defended the most (...) fully developed account based on genetic group selection, and I argue here that problems with this account reveal good reasons to doubt that genetic group selection has played any important role in human evolution at all. Thus, considering the role of group selection in religious evolution is important not just because of what it reveals about religious psychology and religious evolution, but also because of what it reveals about the role of group selection in human evolution more generally. (shrink)

Recognition of and responsiveness to the behavioral dispositions of others are key features of moral systems for facilitating social cooperation and the mediation of punishment. Here we investigate the coevolutionary possibilities of recognition and conditional social behavior with respect to both altruism and spite. Using two evolutionary models, we find that recognition abilities can support both spite and altruism but that some can only coevolve with spite. These results show that it is essential to consider harmful social behaviors (...) as both a product of and an influence on the core features of our moral systems. (shrink)

Altruistic behavior and motivation has traditionally been regarded as a defense mechanism defined by the vicissitudes of instinctual gratification. In this article, we suggest that there exists a substantial body of evidence from the fields of ethology, infant research, and experimental psychology to support the existence of an independently motivated altruism that is nondefensive in nature. We attempt to show how the view of altruism as a universal motivational system stems from the recent developments in evolutionary theory and (...) contributes to our understanding of intrapsychic factors influencing human behavior in general and the process of psychotherapy in particular. It is not our goal to prove the existence of "pure altruism" that can never be derived from selfish motives. Rather, our thesis is that self-oriented and altruistic motivations are equal and essential partners in human evolution and development. It is the optimal balance of these two forces that is necessary for evolutionary advancement and for psychological health. (shrink)

In recent years a number of biologists, anthropologists, and animal scientists have tried to explain the biological evolution of morality, and claim to have found the rudiments of morality in the altruistic behavior of our nearest nonhuman relatives. I argue that there is one feature of morality to which these accounts do not pay adequate attention: normative self-government, the capacity to be motivated to do something by the thought that you ought to do it. This is a feature of (...) the form of moral motivation rather than merely of its content, one that I believe we do not share with non-rational animals. Unlike his more recent followers, Darwin did try to explain how this capacity evolved. I explain Darwin's account and the way it drew on sentimentalist philosophy, and argue that such accounts are unsatisfactory. Drawing on the more radical accounts of the evolution of morality found in thinkers like Nietzsche and Freud, I speculate that moral motivation may have originated with the internalization of the dominance instincts, and sketch the beginnings of the path that the development of reason in both its theoretical and practical employments might have followed. (shrink)

Sober and Wilson have propose a cluster of arguments for the conclusion that “natural selection is unlikely to have given us purely egoistic motives” and thus that psychological altruism is true. I maintain that none of these arguments is convincing. However, the most powerful of their arguments raises deep issues about what egoists and altruists are claiming and about the assumptions they make concerning the cognitive architecture underlying human motivation.

I examine the relationship between evolutionary definitions of altruism that are based on fitness effects and psychological definitions that are based on the motives of the actor. I show that evolutionary altruism can be motivated by proximate mechanisms that are psychologically either altruistic or selfish. I also show that evolutionary definitions do rely upon motives as a metaphor in which the outcome of natural selection is compared to the decisions of a psychologically selfish (or altruistic) individual. Ignoring the (...) precise nature of both psychological and evolutionary definitions has obscured many important issues, including the biological roots of psychological altruism. (shrink)

Building on and partially refining previous theoretical work, this paper presents an extended simulation model of ancestral warfare. This model (1) disentangles attack and defense, (2) tries to differentiate more strictly between selfish and altruistic efforts during war, (3) incorporates risk aversion and deterrence, and (4) pays special attention to the role of brutality. Modeling refinements and simulation results yield a differentiated picture of possible evolutionary dynamics. The main observations are: (i) Altruism in this model is more likely to (...) evolve for defenses than for attacks. (ii) Risk aversion, deterrence and the interplay of migration levels and brutality can change evolutionary dynamics substantially. (iii) Unexpectedly, one occasional simulation outcome is a dynamically stable state of ‘tolerated intergroup theft’, raising the question if corresponding patterns also exist in real intergroup conflicts. Finally, possible implications for theories of the co-evolution of bellicosity and altruism in humans are discussed. (shrink)

Using the Grounded theory, we took 15 Chinese entrepreneurs as the research objects and constructed the entrepreneurial process model of dynamic evolution of entrepreneurial motivation. The model includes seven themes, such as egoist motivation, bottleneck, altruistic motivation, TP/MTP, empathy, responsible leadership, CSR implementation and entrepreneurial performance. Through the analysis of the internal relations between these elements, we abstracts the law of the dynamic evolution process of entrepreneurial motivation of Chinese entrepreneurs, and reveals the mechanism of the dynamic (...) class='Hi'>evolution process of entrepreneurial motivation. The theoretical contribution of this paper is mainly reflected in the following two aspects: it enriches and expands the research results in the field of entrepreneurship motivation of Chinese entrepreneurs. From the perspective of entrepreneurial motivation, this study analyzes the dynamic evolution process of Internet entrepreneurs’ entrepreneurial motivation, extracts the rules of entrepreneurial process of dynamic evolution of Internet entrepreneurs, and provides a new path for enriching and expanding the research on Internet entrepreneurs’ entrepreneurial motivation. The study of turning point that enriches and complements the dynamic evolution of entrepreneurs’ entrepreneurial motivation. Using grounded theory, this paper deeply analyzes the reasons for the dynamic evolution of entrepreneurial motivation, and provides empirical evidence for the research on the evolution of localized entrepreneurial motivation in China. (shrink)