Knowledge of chimpanzees in the wild has expanded dramatically in recent years. This comprehensive volume, edited by Martin Muller, Richard Wrangham, and David Pilbeam, brings together scientists who are leading a revolution to discover and explain what is unique about humans, by studying their closest living relatives. Their observations and conclusions have the potential to transform our understanding of human evolution.

Chimpanzees offer scientists an unmatched view of what distinguishes humanity from its apelike ancestors. Based on evidence from the hominin fossil record and extensive morphological, developmental, and genetic data, Chimpanzees and Human Evolution makes the case that the last common ancestor of chimpanzees and humans was chimpanzee-like. It most likely lived in African rainforests around eight million years ago, eating fruit and walking on its knuckles. Readers will learn why chimpanzees are a better model for the last common ancestor than bonobos, gorillas, or orangutans. A thorough chapter-by-chapter analysis reveals which key traits we share with chimpanzees and which appear to be distinctive to Homo sapiens, and shows how understanding chimpanzees helps us account for the evolution of human uniqueness. Traits surveyed include social behaviors and structures, mating systems, diet, hunting practices, tool use, culture, cognition, and communication.

Edited by three of primatology’s most renowned experts, with contributions from 32 scholars drawing on decades of field research, Chimpanzees and Human Evolution provides readers with detailed up-to-date information on what we can infer about our chimpanzee-like ancestors and points the way forward for the next generation of discoveries.

“This is an important book and likely the most thoughtful of the year in the social sciences… Highly recommended, it is likely to prove one of the most thought-provoking books of the year.”—Tyler Cowen, Marginal Revolution

How did human minds become so different from those of other animals? What accounts for our capacity to understand the way the physical world works, to think ourselves into the minds of others, to gossip, read, tell stories about the past, and imagine the future? These questions are not new: they have been debated by philosophers, psychologists, anthropologists, evolutionists, and neurobiologists over the course of centuries. One explanation widely accepted today is that humans have special cognitive instincts. Unlike other living animal species, we are born with complicated mechanisms for reasoning about causation, reading the minds of others, copying behaviors, and using language.

Cecilia Heyes agrees that adult humans have impressive pieces of cognitive equipment. In her framing, however, these cognitive gadgets are not instincts programmed in the genes but are constructed in the course of childhood through social interaction. Cognitive gadgets are products of cultural evolution, rather than genetic evolution. At birth, the minds of human babies are only subtly different from the minds of newborn chimpanzees. We are friendlier, our attention is drawn to different things, and we have a capacity to learn and remember that outstrips the abilities of newborn chimpanzees. Yet when these subtle differences are exposed to culture-soaked human environments, they have enormous effects. They enable us to upload distinctively human ways of thinking from the social world around us.

As Cognitive Gadgets makes clear, from birth our malleable human minds can learn through culture not only what to think but how to think it.

Our early ancestors lived in small groups and worked actively to preserve social equality. As they created larger societies, however, inequality rose, and by 2500 bce truly egalitarian societies were on the wane. In The Creation of Inequality, Kent Flannery and Joyce Marcus demonstrate that this development was not simply the result of population increase, food surplus, or the accumulation of valuables. Instead, inequality resulted from conscious manipulation of the unique social logic that lies at the core of every human group.

A few societies allowed talented and ambitious individuals to rise in prestige while still preventing them from becoming a hereditary elite. But many others made high rank hereditary, by manipulating debts, genealogies, and sacred lore. At certain moments in history, intense competition among leaders of high rank gave rise to despotic kingdoms and empires in the Near East, Egypt, Africa, Mexico, Peru, and the Pacific.

Drawing on their vast knowledge of both living and prehistoric social groups, Flannery and Marcus describe the changes in logic that create larger and more hierarchical societies, and they argue persuasively that many kinds of inequality can be overcome by reversing these changes, rather than by violence.

Of paramount importance to the natural sciences, the principles of Darwinism, which involve variation, inheritance, and selection, are increasingly of interest to social scientists as well. But no one has provided a truly rigorous account of how the principles apply to the evolution of human society—until now.

In Darwin’s Conjecture, Geoffrey Hodgson and Thorbjørn Knudsen reveal how the British naturalist’s core concepts apply to a wide range of phenomena, including business practices, legal systems, technology, and even science itself. They also critique some prominent objections to applying Darwin to social science, arguing that ultimately Darwinism functions as a general theoretical framework for stimulating further inquiry. Social scientists who adopt a Darwinian approach, they contend, can then use it to frame and help develop new explanatory theories and predictive models.

This truly pathbreaking workat long last makes the powerful conceptual tools of Darwin available to the social sciences and will be welcomed by scholars and students from a range of disciplines.

Can human social evolution be described in terms common to other sciences, most specifically, as an energy process? The Eighth Day reflects a conviction that the human trajectory, for all its uniqueness and indeterminism, will never be satisfactorily understood until it is framed in dynamics that are common to all of nature. The problem in doing this, however, lies in ourselves. The major social theories have failed to treat human social evolution as a component of broader natural processes.

The Eighth Day argues that the energy process provides a basis for explaining, comparing, and measuring complex social evolution. Using traditional ecological energy flow studies as background, society is conceived as a self-organization of energy. This perspective enables Adams to analyze society in term of the natural selection of self-organizing energy forms and the trigger processes basic to it. Domestication, civilization, socioeconomic development, and the regulation of contemporary industrial nation-states serve to illustrate the approach. A principal aim is to explore the limitation that energy process imposes on human social evolution as well as to clarify the alternatives that it allows.

Richly informed by contemporary anthropological historicism, sociobiology, and Marxism, The Eighth Day avoids simple reductionism and denies facile ideological categorization. Adams builds on work in nonequilibrium thermodynamics and theoretical biology and brings three decades of his own work to an analysis of human society that demands an extreme materialism in which human thought and action find a central place.

Tracing the leading role of emotions in the evolution of the mind, a philosopher and a psychologist pair up to reveal how thought and culture owe less to our faculty for reason than to our capacity to feel.

Many accounts of the human mind concentrate on the brain’s computational power. Yet, in evolutionary terms, rational cognition emerged only the day before yesterday. For nearly 200 million years before humans developed a capacity to reason, the emotional centers of the brain were hard at work. If we want to properly understand the evolution of the mind, we must explore this more primal capability that we share with other animals: the power to feel.

Emotions saturate every thought and perception with the weight of feelings. The Emotional Mind reveals that many of the distinctive behaviors and social structures of our species are best discerned through the lens of emotions. Even the roots of so much that makes us uniquely human—art, mythology, religion—can be traced to feelings of caring, longing, fear, loneliness, awe, rage, lust, playfulness, and more.

From prehistoric cave art to the songs of Hank Williams, Stephen T. Asma and Rami Gabriel explore how the evolution of the emotional mind stimulated our species’ cultural expression in all its rich variety. Bringing together insights and data from philosophy, biology, anthropology, neuroscience, and psychology, The Emotional Mind offers a new paradigm for understanding what it is that makes us so unique.

In this spirited and irreverent critique of Darwin’s long hold over our imagination, a distinguished philosopher of science makes the case that, in culture as well as nature, not only the fittest survive: the world is full of the “good enough” that persist too.

Why is the genome of a salamander forty times larger than that of a human? Why does the avocado tree produce a million flowers and only a hundred fruits? Why, in short, is there so much waste in nature? In this lively and wide-ranging meditation on the curious accidents and unexpected detours on the path of life, Daniel Milo argues that we ask these questions because we’ve embraced a faulty conception of how evolution—and human society—really works.

Good Enough offers a vigorous critique of the quasi-monopoly that Darwin’s concept of natural selection has on our idea of the natural world. Darwinism excels in accounting for the evolution of traits, but it does not explain their excess in size and number. Many traits far exceed the optimal configuration to do the job, and yet the maintenance of this extra baggage does not prevent species from thriving for millions of years. Milo aims to give the messy side of nature its due—to stand up for the wasteful and inefficient organisms that nevertheless survive and multiply.

But he does not stop at the border between evolutionary theory and its social consequences. He argues provocatively that the theory of evolution through natural selection has acquired the trappings of an ethical system. Optimization, competitiveness, and innovation have become the watchwords of Western societies, yet their role in human lives—as in the rest of nature—is dangerously overrated. Imperfection is not just good enough: it may at times be essential to survival.

What a big brain we have for all the small talk we make. It's an evolutionary riddle that at long last makes sense in this intriguing book about what gossip has done for our talkative species. Psychologist Robin Dunbar looks at gossip as an instrument of social order and cohesion--much like the endless grooming with which our primate cousins tend to their social relationships.

Apes and monkeys, humanity's closest kin, differ from other animals in the intensity of these relationships. All their grooming is not so much about hygiene as it is about cementing bonds, making friends, and influencing fellow primates. But for early humans, grooming as a way to social success posed a problem: given their large social groups of 150 or so, our earliest ancestors would have had to spend almost half their time grooming one another--an impossible burden. What Dunbar suggests--and his research, whether in the realm of primatology or in that of gossip, confirms--is that humans developed language to serve the same purpose, but far more efficiently. It seems there is nothing idle about chatter, which holds together a diverse, dynamic group--whether of hunter-gatherers, soldiers, or workmates.

Anthropologists have long assumed that language developed in relationships among males during activities such as hunting. Dunbar's original and extremely interesting studies suggest otherwise: that language in fact evolved in response to our need to keep up to date with friends and family. We needed conversation to stay in touch, and we still need it in ways that will not be satisfied by teleconferencing, email, or any other communication technology. As Dunbar shows, the impersonal world of cyberspace will not fulfill our primordial need for face-to-face contact.

From the nit-picking of chimpanzees to our chats at coffee break, from neuroscience to paleoanthropology, Grooming, Gossip, and the Evolution of Language offers a provocative view of what makes us human, what holds us together, and what sets us apart.

Are humans by nature hierarchical or egalitarian? Hierarchy in the Forest addresses this question by examining the evolutionary origins of social and political behavior. Christopher Boehm, an anthropologist whose fieldwork has focused on the political arrangements of human and nonhuman primate groups, postulates that egalitarianism is in effect a hierarchy in which the weak combine forces to dominate the strong.

The political flexibility of our species is formidable: we can be quite egalitarian, we can be quite despotic. Hierarchy in the Forest traces the roots of these contradictory traits in chimpanzee, bonobo, gorilla, and early human societies. Boehm looks at the loose group structures of hunter-gatherers, then at tribal segmentation, and finally at present-day governments to see how these conflicting tendencies are reflected.

Hierarchy in the Forest claims new territory for biological anthropology and evolutionary biology by extending the domain of these sciences into a crucial aspect of human political and social behavior. This book will be a key document in the study of the evolutionary basis of genuine altruism.

Alison Jolly believes that biologists have an important story to tell about being human—not the all-too-familiar tale of selfishness, competition, and biology as destiny but rather one of cooperation and interdependence, from the first merging of molecules to the rise of a species inextricably linked by language, culture, and group living. This is the story that unfolds in Lucy’s Legacy, the saga of human evolution as told by a world-renowned primatologist who works among the female-dominant ringtailed lemurs of Madagascar.

We cannot be certain that Lucy was female—the bones themselves do not tell us. However, we do know, as Jolly points out in this erudite, funny, and informative book, that the females who came after Lucy—more adept than their males in verbal facility, sharing food, forging links between generations, migrating among places and groups, and devising creative mating strategies—played as crucial a role in the human evolutionary process as “man” ever did. In a book that takes us from the first cell to global society, Jolly shows us that to learn where we came from and where we go next, we need to understand how sex and intelligence, cooperation and love, emerged from the harsh Darwinian struggle in the past, and how these natural powers may continue to evolve in the future.

In the late 1770s, as a wave of revolution and republican unrest swept across Europe, scholars looked with urgency on the progress of European civilization. The question of social development was addressed from Edinburgh to St. Petersburg, with German scholars, including C. G. Heyne, Christoph Meiners, and J. G. Eichhorn, at the center of the discussion.

Michael Carhart examines their approaches to understanding human development by investigating the invention of a new analytic category, "culture." In an effort to define human nature and culture, scholars analyzed ancient texts for insights into language and the human mind in its early stages, together with writings from modern travelers, who provided data about various primitive societies. Some scholars began to doubt the existence of any essential human nature, arguing instead for human culture. If language was the vehicle of reason, what did it mean that all languages were different? Were rationality and virtue universal or unique to a given nation?

In this scholarship lie the roots of anthropology, sociology, and classical philology. Dissecting the debates over nature versus culture in Enlightenment Europe, Carhart offers a valuable contribution to cultural and intellectual history and the history of the human sciences.

How did we become the linguistic, cultured, and hugely successful apes that we are? Our closest relatives--the other mentally complex and socially skilled primates--offer tantalizing clues. In Tree of Origin nine of the world's top primate experts read these clues and compose the most extensive picture to date of what the behavior of monkeys and apes can tell us about our own evolution as a species.

It has been nearly fifteen years since a single volume addressed the issue of human evolution from a primate perspective, and in that time we have witnessed explosive growth in research on the subject. Tree of Origin gives us the latest news about bonobos, the "make love not war" apes who behave so dramatically unlike chimpanzees. We learn about the tool traditions and social customs that set each ape community apart. We see how DNA analysis is revolutionizing our understanding of paternity, intergroup migration, and reproductive success. And we confront intriguing discoveries about primate hunting behavior, politics, cognition, diet, and the evolution of language and intelligence that challenge claims of human uniqueness in new and subtle ways.

Tree of Origin provides the clearest glimpse yet of the apelike ancestor who left the forest and began the long journey toward modern humanity.