Edward O. Wilson's ambitions never respected the boundary between the sciences and the humanities. From the final chapter of Sociobiology (1975), which reached provocatively toward human society, through Genes, Mind and Culture (1981), Consilience (1998), and The Origins of Creativity (2017), he pressed repeatedly across that boundary, seeking to bring the social sciences and the humanities into contact with evolutionary biology. This chapter traces that reach discipline by discipline: Wilson's provocative early forecast that the social sciences would be absorbed into a biological understanding of human behavior, his sustained and often unsparing critique of anthropology, sociology, economics, and the other human sciences, his account of the human universals and evolved predispositions on which he thought those sciences must be built, and the fierce disciplinary resistance his incursions provoked. The general program of consilience is treated in Chapter 20, the biology of the arts in Chapter 24, and the gene-culture mechanism in Chapter 14; here the subject is Wilson's specific engagement with the individual disciplines of the humanities and social sciences — the concrete encounters, and collisions, between his evolutionary biology and the established fields that study humankind.
Wilson's opening move was among the most audacious intellectual claims of the twentieth century, and it set the terms of everything that followed. In the final chapter of Sociobiology, having surveyed the biological basis of social behavior across the whole animal kingdom from colonial microorganisms to primates, he forecast that the social sciences — sociology, anthropology, psychology, and the rest — would eventually be absorbed into, or at least fundamentally reconstructed by, a biology-based understanding of human behavior. The opening chapter of that book read, as observers immediately recognized, as a manifesto for a new science, boldly claiming intellectual territory long held by the social sciences and the humanities. Wilson envisioned a future in which the study of human society would be placed on evolutionary foundations, in which the disciplines that study humankind would be unified with biology as branches of a single science of behavior, and in which the artificial separation between the study of human beings and the study of the rest of life would at last be overcome. This was a breathtaking assertion of biology's reach, and it was received in many quarters not as an invitation but as an act of aggression — an attempt by a biologist to annex the human sciences to his own field.
The vision Wilson sketched here was one he would pursue for the rest of his career, refining the crude annexation of the Sociobiology forecast into the more nuanced program of consilience. He came to speak not of biology swallowing the social sciences but of the two being joined, of the gap between them being bridged, of a unified human science in which the study of society would be grounded in, but not reduced to, the study of the evolved human organism. Yet the fundamental conviction never changed: that the social sciences and humanities could not be fully successful so long as they remained cut off from the biological understanding of human nature, and that the future of the human sciences lay in their integration with evolutionary biology, psychology, and the brain sciences. Wilson foresaw, as he put it, a future unification of the natural sciences with the social sciences and the humanities — a single, connected structure of knowledge in which the disciplines that study humankind would take their place alongside the disciplines that study the rest of nature, related to them as chemistry is related to physics, or biology to chemistry.
Wilson's boldest and most sustained engagement with a particular discipline was his critique of the social sciences as they actually existed, which he found to be, in a word he used pointedly, adrift. The social sciences, he argued, had become fragmented and incoherent, cut off from the biological foundations that alone could give them genuine explanatory power, each discipline pursuing its own methods and models in isolation from the others and from the natural sciences beneath them. He traced this condition to a deep intellectual gap separating the social sciences from biology — a gap rooted, in his diagnosis, not in any real discontinuity in nature but in a persistent reluctance among social scientists to accept that human beings have an evolved nature at all. Committed to the view that human behavior is shaped almost entirely by culture and environment, the social sciences had, in Wilson's account, walled themselves off from the biology that could explain why human cultures take the forms they do, and had thereby condemned themselves to description without explanation, to the cataloguing of human variety without any account of the human nature underlying it. The remedy he prescribed was consistent across every discipline: the social sciences must be grounded in biology, psychology, and evolution if they are to become genuinely explanatory sciences rather than collections of unconnected observations.
When Wilson turned to particular social-science disciplines, he distributed praise and blame with discrimination. Economics drew his sharpest criticism. He faulted it for resting on unrealistic models of human behavior — above all the fiction of a perfectly rational, self-interested agent, the so-called economic man who calculates his advantage with flawless logic and unlimited information — models detached from the actual evolved psychology of real human beings, who are emotional, biased, tribal, and bounded in their rationality in ways that evolution explains. A consilient economics, Wilson argued, would begin instead from a realistic understanding of human nature as evolution actually shaped it, taking account of the emotions and instincts that genuinely drive human economic behavior, and would thereby gain a predictive accuracy that the idealized models of classical economics could never achieve. Anthropology, by contrast, earned Wilson's respect and even his hope. He identified it as the social science best positioned to connect biology and culture, straddling as it does the boundary between the natural and the human, and possessing in its comparative study of human societies precisely the data on human universals that a biological understanding of human nature required. If any of the established human sciences could serve as the bridge to biology, Wilson believed, it was anthropology.
It is worth pausing to note that the traffic between biology and the social sciences ran, in Wilson's own work, in both directions — for even as he sought to extend biology into the human disciplines, he freely imported the concepts and tools of the human disciplines into biology. His study of ant colonies drew openly on economics, demography, and the other social sciences he elsewhere criticized. He introduced an explicitly ergonomic view of the colony, treating it as a system that optimizes the allocation of its workers among competing tasks much as an economy allocates labor, and he analyzed the optimization of caste ratios in the language of cost and benefit. He applied population biology to the colony's growth, maturation, and reproduction, treating its demographic trajectory with the tools developed for human populations. He applied foraging theory — a body of economic reasoning about the efficient allocation of effort — to the way colonies deploy their foragers to maximize energetic yield. And he analyzed territoriality as an economic defense of resources, evolving precisely when the benefits of exclusive access exceed the costs of defending it. This borrowing was not incidental; it reflected Wilson's deep conviction that the same principles of optimization, allocation, and strategic behavior operate across the living world, in insect colonies and human economies alike, and that the boundary between the biological and the social sciences was, at the level of underlying principle, far more porous than either side generally acknowledged.
This two-way traffic illuminated the character of Wilson's whole enterprise. He did not regard biology and the social sciences as sealed compartments, one of which must simply conquer the other, but as neighboring territories between which concepts and methods could and should flow freely. The economist's tools illuminated the ant colony; the biologist's understanding of human nature could, he believed, illuminate the human economy; and the deeper truth revealed by this exchange was the underlying unity of the phenomena the two sciences studied. When Wilson called for grounding the social sciences in biology, he was not proposing to abolish their distinctive concerns but to connect them to the biological principles that, in his view, ultimately underlay them — just as he had connected the study of ant societies to the economic principles of optimization without thereby ceasing to study ants. The consilience he sought was not the victory of one discipline over another but the recognition of the connections that ran beneath them all, and his own practice, borrowing freely across the boundary he sought to bridge, was itself a demonstration of the unity of knowledge he preached.
The foundation on which Wilson proposed to rebuild the human sciences was the concept of human universals — the features that recur across every known human society, and that he took as evidence of a shared, evolved human nature. Drawing on the anthropological record, he catalogued the traits that appear in culture after culture: kinship systems and the classification of relatives, the incest taboo and the avoidance it enforces, the sexual division of labor, status-seeking and hierarchy, gift exchange, marriage customs, religious belief, aesthetic expression, and many more. These universals, Wilson argued, are not arbitrary cultural conventions that happen to have arisen independently in many places, but the predictable expressions of a human nature shaped by natural selection during the long prehistory of hunter-gatherer life. To study them systematically, comparing human behavior with that of other primates and social mammals to identify the traits we share and those that are distinctively human, was for Wilson the proper method of a biologically grounded human science. The universals were the visible fingerprints of the evolved human nature that underlies all cultures, and their systematic study, he believed, could reveal the biological regularities on which the diversity of human societies is built.
Wilson's method for identifying the evolved core of human behavior was the comparative approach, borrowed from evolutionary biology and applied to the human sciences. By comparing human behavior with that of other primates and social mammals, he argued, one could identify which human traits are likely to be ancestral and evolved rather than recent cultural inventions — for a behavior found in humans and in our close primate relatives alike is more plausibly a shared evolutionary inheritance than an independent cultural creation. This comparative method placed the study of humankind squarely within the framework of evolutionary biology, treating human beings as one species among the social mammals, to be understood by the same comparative logic applied to any other. It was, for Wilson, a natural extension of the biologist's approach into territory the social sciences had claimed as uniquely their own, and it exemplified his conviction that the study of human behavior belonged to biology as much as to the humanities. Psychology, of all the human sciences, Wilson regarded as the most naturally continuous with biology — the discipline where the study of the evolved brain and the study of human behavior most directly meet — and he looked to a psychology grounded in evolution and neuroscience to serve, alongside anthropology, as one of the principal bridges by which the human sciences would ultimately be joined to the study of life. The comparative study of behavior across species, and the grounding of psychology in the biology of the brain, were for Wilson the twin methodological foundations on which a genuinely unified human science would have to be built.
Central to Wilson's account of how this evolved nature shapes human behavior was the concept of prepared learning — the idea that human beings are not blank slates that learn anything with equal ease, but creatures biologically prepared to acquire certain behaviors, fears, and associations more readily than others. We learn to fear snakes and spiders far more easily than we learn to fear more dangerous but evolutionarily novel threats like automobiles or electrical outlets, because our ancestors who readily acquired such fears survived to reproduce. This prepared learning, Wilson argued, reflects the evolved biases built into the human mind, and it channels human cultural development along certain more probable pathways, so that human cultures, for all their variety, tend to converge on certain recurring patterns. He connected this to the broader phenomena of the canalization of development, whereby human development tends toward species-typical outcomes across a range of environments, and of critical periods, during which certain experiences must occur if normal development is to proceed. Together these concepts described a human nature that is neither rigidly fixed nor infinitely malleable, but structured — a nature that constrains and biases the acquisition of culture without wholly determining it, and that any adequate human science must therefore take into account.
Wilson used these ideas to reframe one of the oldest debates in the study of humankind: the nature-nurture controversy. The old opposition between nature and nurture, between heredity and environment as the source of human behavior, was, he argued, fundamentally misconceived. Human behavior does not spring from genes alone or from environment alone, but emerges from the interaction of the two — from an evolved nature that predisposes and biases, working through the particular environments and cultures in which individuals develop. The question was never whether nature or nurture determines behavior, but how the two interact, how the evolved predispositions of human nature are expressed, channeled, and modified by experience and culture. This reframing allowed Wilson to reject the extreme environmentalism that had dominated the social sciences — the view that human behavior is almost infinitely malleable and shaped entirely by culture and environment, with biology contributing nothing but a general capacity for learning — while equally rejecting any crude genetic determinism. Human nature, in his account, sets the terms within which culture operates, biasing development toward certain outcomes while leaving enormous room for variation; and a science of human behavior adequate to this reality would have to be, at once, a biological and a cultural science.
With his collaborator Charles Lumsden, in Genes, Mind and Culture, Wilson attempted to give this vision rigorous and even mathematical form, aiming to place the study of human behavior on a predictive scientific footing. The book opened by diagnosing a missing linkage between evolutionary biology and the social sciences — a gap where a theory connecting genes to culture ought to be — and set out to supply it with the theory of gene-culture coevolution and its associated machinery of epigenetic rules and culturgens (the mechanism is treated in Chapter 14). What matters for the present chapter is the disciplinary ambition of the enterprise: Lumsden and Wilson explicitly sought to place human sociobiology on a rigorous, predictive foundation, to make the study of human behavior a genuine science capable of quantitative prediction rather than mere interpretation, and to draw out the consequences of their theory for the social sciences as a whole. They argued that culture cannot be fully understood without reference to the evolved human mind that produces and transmits it, and that the social sciences, by ignoring this biological foundation, had cut themselves off from the deeper understanding that a unified human science could provide. The book was, in effect, an attempt to build the bridge between biology and the social sciences that Wilson had been calling for since Sociobiology.
The predictive machinery Lumsden and Wilson constructed was genuinely novel in its ambition to quantify culture. They introduced, for instance, the ethnographic curve, a distribution describing how frequently different cultural choices appear across the world's societies — a tool intended to make the patterning of human culture measurable, and to connect the observed distribution of cultural forms to the underlying epigenetic rules that biased them. The aim was to move human sociobiology beyond verbal argument toward the kind of quantitative, testable prediction that characterizes the mature natural sciences: to predict, from a knowledge of the evolved biases of the human mind, the statistical distribution of cultural practices across societies. Whether the apparatus succeeded is another matter — many found it more suggestive than rigorous, and the specific predictions difficult to test — but the ambition was clear and characteristic. Wilson wanted the study of human culture to become a predictive science, and he was willing to risk the elaborate and speculative machinery of culturgens, assimilation functions, and ethnographic curves in the attempt to make it one. It was, even to some sympathetic readers, an overreach; but it was an overreach in the direction of rigor, an insistence that the human sciences aspire to the predictive standards of the natural ones.
Wilson and Lumsden were careful, at least in principle, to guard against one of the most persistent objections to their program: the charge that grounding the social sciences in biology would license the naturalization of injustice, treating whatever human tendencies evolution had produced as therefore right or inevitable. They cautioned explicitly that describing an evolved tendency does not amount to endorsing it — that to explain the biological roots of a behavior is not to justify it, and that the recognition of an evolved disposition carries no automatic implication that the disposition ought to be indulged or preserved. This was Wilson's answer to the fear, widespread among his critics in the social sciences, that human sociobiology was a covertly conservative doctrine, a biological rationalization of existing inequalities and hierarchies. He insisted, on the contrary, that understanding the evolved tendencies of human nature was precisely what would allow humanity to manage them wisely — to recognize which of its inherited dispositions served it well and which, adaptive in the ancestral past, had become destructive in the modern world, and to build social arrangements that worked with human nature where it was benign and against it where it was not. The biological understanding of human behavior, in this account, was not a counsel of resignation but a tool of reform, and the social sciences, properly grounded in it, would be better equipped, not worse, to improve the human condition.
What Wilson promised the human sciences in return for accepting biological grounding was a prize they had long sought and never attained: genuine predictive and explanatory power. The established social sciences, he argued, excelled at description but faltered at explanation and prediction, able to catalogue the diversity of human behavior and to interpret its meanings but unable to say why human societies take the forms they do or to predict how they will change. A biologically grounded human science, by contrast, would be able to explain human behavior in terms of its evolutionary origins and its underlying mechanisms, and thereby to achieve something of the predictive rigor that distinguishes the mature natural sciences. This was the reward Wilson held out for consilience: not the humiliation of the social sciences by biology, but their elevation — their transformation from interpretive disciplines into genuine explanatory sciences, joined to the rest of knowledge and empowered by that connection to understand their subject as they never had before. The unified human science he envisioned would join the social sciences with biology and psychology, dissolving the artificial barriers between them and grounding the study of human affairs in a realistic understanding of the evolved human creature.
Wilson's incursions into the humanities and social sciences did not go unopposed; on the contrary, they provoked some of the fiercest intellectual resistance of his career. Many social scientists and humanists regarded his program as an act of intellectual imperialism, an attempt by a biologist to colonize fields he did not understand and to reduce the rich complexity of human culture and history to evolutionary mechanism. The reception of human sociobiology in particular was bitter and sustained, and Wilson found himself accused not only of scientific error but of ideological motivation, of using biology to naturalize existing social arrangements and to deny the possibility of social change. He had, in fact, anticipated this reaction: even in Sociobiology he had explicitly predicted that applying evolutionary biology to human beings would provoke intense resistance, and had tried, unsuccessfully, to distinguish scientific explanation from political endorsement in advance. With Lumsden he devoted a substantial part of Genes, Mind and Culture to answering the critics, defending gene-culture coevolution against the charge of genetic determinism by emphasizing the flexibility of the epigenetic rules and the enormous scope they left for cultural variation. The resistance was, in part, a genuine scientific disagreement about the extent and rigidity of human nature; but it was also, Wilson believed, a defense of disciplinary territory, a reluctance among students of humankind to cede any ground to biology or to accept that the creatures they studied were, after all, animals shaped by natural selection.
Wilson was sensitive to the disciplinary politics of his enterprise, and he understood the dynamics of intellectual boundary-defense from long experience. He had lived through the molecular wars at Harvard, in which his own field of organismic biology had been threatened with absorption by the ascendant molecular biology (recounted in Chapter 15), and he drew on that experience a general understanding of how established disciplines resist encroachment from adjacent fields. A field under pressure from a neighboring discipline, he observed, characteristically defends its autonomy, insists on the irreducibility of its subject matter, and resists the reductive ambitions of its rivals. Wilson saw the resistance of the social sciences to biology in these terms — as a predictable episode of disciplinary boundary-defense rather than as a principled refutation of his ideas — and he remained convinced that the boundaries would eventually give way, as the boundary between chemistry and physics had given way, before the advancing connections of consilient science. Yet he acknowledged, too, that the connection between biology and the study of human culture was genuinely more difficult to establish than the connections lower down in the hierarchy of the sciences, that the complexity of human phenomena posed real and perhaps formidable obstacles to the unification he sought, and that his program remained, for all his confidence, a promissory note rather than an accomplished achievement.
Time has rendered a mixed verdict on Wilson's disciplinary ambitions, vindicating them in part while leaving the largest claims unresolved. In the decades after Sociobiology, the evolutionary study of human behavior did take root and flourish, not by absorbing the social sciences as Wilson had once forecast, but by establishing itself alongside them — in the emergence of new fields explicitly devoted to the evolutionary analysis of the human mind and human behavior, which drew directly on the program Wilson had been vilified for proposing. The evolutionary approach to human nature that had provoked such fury in the 1970s became, over the following decades, a respectable and productive research tradition, its central premise — that the human mind is a product of evolution and bears the marks of its adaptive history — increasingly accepted across psychology and even parts of anthropology and economics. In this qualified sense Wilson's incursion succeeded: the biological understanding of human behavior he had championed against fierce resistance won a permanent place in the study of humankind. Yet the grander unification he envisioned, in which the social sciences and humanities would be fully joined to biology in a single consilient structure, remained unrealized, and the autonomy of the human sciences remained, in large measure, intact. Wilson had changed the terms of the debate and secured a hearing for biology within the study of humankind; whether the deeper unity he sought will ever be achieved remains, as he himself acknowledged, a question for the future.
Seen whole, Wilson's engagement with the humanities and social sciences was the most ambitious and the most contested extension of his life's work — the attempt to bring the disciplines that study humankind into the fold of a unified, biologically grounded science of behavior. To his admirers, it was a necessary and overdue correction, a call to ground the study of human beings in the evolutionary understanding of what human beings actually are, and a promise of the explanatory power that the human sciences had long lacked. To his critics, it was an overreach that mistook the explanation of human nature's biological substrate for an explanation of human culture and history in their full richness, and that threatened to flatten the distinctively human dimensions of meaning, agency, and history into evolutionary mechanism. The disagreement remains live, and this reader does not attempt to settle it. What is clear is that Wilson forced the question — that he compelled the human sciences to confront the biological nature of their subject, and that he articulated, more forcefully than anyone of his generation, the case for a unified understanding of humankind that would join the study of human society to the study of human evolution. Whether that unification is ultimately achievable, or whether the human sciences possess an autonomy that biology cannot dissolve, is a question his work posed with unmatched clarity and left, deliberately, for the future to answer.
Wilson's reach across the disciplines was, in the end, an expression of the same synthesizing conviction that animated the whole of his work: that knowledge is one, that the divisions between the fields are historical accidents rather than natural boundaries, and that the study of humankind cannot finally be separated from the study of the life of which humankind is a part. The naturalist who had spent his life tracing the connections within the living world could not accept that the human world stood outside it, governed by principles wholly its own and immune to biological understanding. He insisted, against the settled convictions of the human sciences, that human beings are animals, that their societies and cultures and histories are the products of evolved minds, and that the disciplines which study them must therefore reckon with the biology of the human creature. It was a claim that many found threatening and some found liberating, and that remains, decades later, one of the great unresolved questions at the intersection of the sciences and the humanities. But it was, unmistakably, of a piece with everything Wilson believed: that the boundaries dividing human knowledge are provisional, that the deepest understanding comes from connecting what has been kept apart, and that the study of humanity, like the study of the ant and the island, is finally a branch of the study of life.