Lucy's Legacy Lucy's Legacy

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Overview

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.

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Editorial Reviews

New York Times Book Review

In Lucy's Legacy, a charming, eclectic and sensible book, [Jolly] argues that while evolution certainly involves competition, the major transitions have arisen through cooperation...With humor and erudition she leads the reader to an understanding of the biology and behavior of primates, through the evolution of intelligence and into 'the age of humanity,' where evolution is charted chiefly by the human mind. Her genius in this informative, satisfying book is to strip away dogma and politics that have shrouded evolution, to reveal a theory Darwin would recognize as his own. 'There is grandeur in this view of life,' he wrote, and here it is seen marvelously.
— Ellen Ruppel Shell

Nature

Allison Jolly's book is a refreshing and stimulating account of evolution, and especially the evolution of sex and intelligence in humans and primates. One of its strengths is her presentation of the female view. We men have always had a tendency to consider life from our own perspective...Jolly proposes that the traditional feminine viewpoint on evolution is one of cooperative organization and not of competition. This is the counterpart to the fundamental dilemma for anyone trained in Darwinian evolutionary theory, with its emphasis on rampant individualism.
— Christophe Boesch

The Independent

This is a book which agrees that nature is often red in tooth and claw, but encourages us to feel good about it all the same...Everybody should understand [sociobiology's] essentials, and Jolly's book provides an excellent outline...She writes with a serenity that is especially pleasing in a field usually harsh with the sound of grinding axes...One of this book's most valuable dimensions is its calm exposition of a worldview which is unequivocally sociobiological, and at the same time sure in its affirmation of feminist and liberal values.
— Marek Kohn

The Guardian

One of the things that makes this book so satisfying is the way it clearly and cleverly gets around the whole nature/nurture question by looking at the complex interplay between a mother and baby, in which each is programmed to learn from the other. This is not what anyone would call headline science: it's just well-written, witty, thought-provoking and full of fascinating detail. You don't learn how to do primatology, but you do learn what kind of primate you are, which is, for most people, more valuable.
— Andrew Brown

New Scientist

[Jolly's] method is to offer a host of lively facts to grip the imagination...All this provides a rich mix, which could have ended up as a convoluted tangle of facts. But Jolly bounds from topic to topic with all the assurance of one of her beloved lemurs...Her book is full of wry, ironic humour, as well as knowledgeable remarks about the way science works...Bolstered by acute analysis of the degree of mental sophistication of the great apes, Jolly produces a convincing reappraisal of the position of male and female in human evolution...Lucy's Legacy has the tone of a wise friend reminding you of things you had forgotten while arranging them for you in a delightful, previously unperceived and revelatory way—and doing this for your edification, rather than for their own glory...Jolly's subject is serious, her erudition profound in a book deft and sure enough to engage even those with the briefest of biological backgrounds. She has pulled off the most elegant of scientific popularisation tricks: being light without being lightweight.
— Adrian Barnett

American Scientist

This is an engaging romp through the human story and a thoughtful exploration of who we are as both a biological and a cultural species. Although Jolly covers a considerable diversity of topics in four major sections, each chapter of the story is woven together with a unifying theme of cooperation...Jolly does an elegant job weaving biology, history, art poetry, anecdotes and facts alike to unfold the tapestry of who we are as a species. This book provides a thoughtful review of many decades of research by biologists, primatologists, sociobiologists and evolutionary psychologists, although Jolly's original ideas pepper the discussion. It is an erudite and witty think piece, liberally seasoned with insights and illustrations gleaned from throughout the humanities and sciences—an appropriate blend from the author who bemoans the arbitrary dichotomization of human biology and human culture. Indeed, for those of us who believe that both biology and culture can contribute to our understanding of who we are as a species, this book is an amusing read and a refreshing antidote to the estrangement of the natural and social sciences.
— Joanna E. Lambert

Globe & Mail

A good book worth reading.
— Michael Ruse

Scientific American

Jolly traces four evolutionary transitions in this compelling book and says we are in the early stages of a fifth...The range of things Jolly knows is stunning, and the connections she finds among those things are often startling. She flavors her gripping tale with lines from poems. Occasionally she throws in a joke..[and] she is hopeful that the fifth transition will turn out well.

Booklist

Primatologist Jolly accents the imperatives of reproduction as an evolutionary force, from the australopithecines onward, particularly as an influence on increasing brainpower.
— Gilbert Taylor

Times Literary Supplement

[Jolly's] inspiring account of our past and potential future...shows how...the epic story of our evolution can be told as much in terms of co-operative interplay as competition...Jolly guides us through these debates and others with a delightful mixture of common sense, panache, and up-to-date erudition...[Lucy's Legacy] is stuffed with a wonderful array of facts that ground Jolly's assertions.
— Andrew Whiten

Times Higher Education Supplement

Jolly has made two of the most significant contributions to paradigm shifts in primatology. She was the first to recognise the social power of females in groups, and she formulated the first statement of the social intelligence hypothesis, which argues that intelligence and mentality are consequences of social opportunities, not by-products of tool use, bipedalism or human language... Lucy's Legacy is beautifully written, elegant, poetic and artistic as well as deeply knowledgeable.
— Phyllis Lee

Evolutionary Anthropology

Lucy's Legacy is really a compendium of all that has been accomplished in animal behavior and evolutionary biology since 1960…Here we have all the major achievements from the past few decades and, taken together, as they are in this book, the whole is impressive…Jolly is at her best when writing about humans.
— Meredith Small

New York Times Book Review - Ellen Ruppel Shell
In Lucy's Legacy, a charming, eclectic and sensible book, [Jolly] argues that while evolution certainly involves competition, the major transitions have arisen through cooperation...With humor and erudition she leads the reader to an understanding of the biology and behavior of primates, through the evolution of intelligence and into 'the age of humanity,' where evolution is charted chiefly by the human mind. Her genius in this informative, satisfying book is to strip away dogma and politics that have shrouded evolution, to reveal a theory Darwin would recognize as his own. 'There is grandeur in this view of life,' he wrote, and here it is seen marvelously.
Nature - Christophe Boesch
Allison Jolly's book is a refreshing and stimulating account of evolution, and especially the evolution of sex and intelligence in humans and primates. One of its strengths is her presentation of the female view. We men have always had a tendency to consider life from our own perspective...Jolly proposes that the traditional feminine viewpoint on evolution is one of cooperative organization and not of competition. This is the counterpart to the fundamental dilemma for anyone trained in Darwinian evolutionary theory, with its emphasis on rampant individualism.
The Independent - Marek Kohn
This is a book which agrees that nature is often red in tooth and claw, but encourages us to feel good about it all the same...Everybody should understand [sociobiology's] essentials, and Jolly's book provides an excellent outline...She writes with a serenity that is especially pleasing in a field usually harsh with the sound of grinding axes...One of this book's most valuable dimensions is its calm exposition of a worldview which is unequivocally sociobiological, and at the same time sure in its affirmation of feminist and liberal values.
The Guardian - Andrew Brown
One of the things that makes this book so satisfying is the way it clearly and cleverly gets around the whole nature/nurture question by looking at the complex interplay between a mother and baby, in which each is programmed to learn from the other. This is not what anyone would call headline science: it's just well-written, witty, thought-provoking and full of fascinating detail. You don't learn how to do primatology, but you do learn what kind of primate you are, which is, for most people, more valuable.
New Scientist - Adrian Barnett
[Jolly's] method is to offer a host of lively facts to grip the imagination...All this provides a rich mix, which could have ended up as a convoluted tangle of facts. But Jolly bounds from topic to topic with all the assurance of one of her beloved lemurs...Her book is full of wry, ironic humour, as well as knowledgeable remarks about the way science works...Bolstered by acute analysis of the degree of mental sophistication of the great apes, Jolly produces a convincing reappraisal of the position of male and female in human evolution...Lucy's Legacy has the tone of a wise friend reminding you of things you had forgotten while arranging them for you in a delightful, previously unperceived and revelatory way--and doing this for your edification, rather than for their own glory...Jolly's subject is serious, her erudition profound in a book deft and sure enough to engage even those with the briefest of biological backgrounds. She has pulled off the most elegant of scientific popularisation tricks: being light without being lightweight.
American Scientist - Joanna E. Lambert
This is an engaging romp through the human story and a thoughtful exploration of who we are as both a biological and a cultural species. Although Jolly covers a considerable diversity of topics in four major sections, each chapter of the story is woven together with a unifying theme of cooperation...Jolly does an elegant job weaving biology, history, art poetry, anecdotes and facts alike to unfold the tapestry of who we are as a species. This book provides a thoughtful review of many decades of research by biologists, primatologists, sociobiologists and evolutionary psychologists, although Jolly's original ideas pepper the discussion. It is an erudite and witty think piece, liberally seasoned with insights and illustrations gleaned from throughout the humanities and sciences--an appropriate blend from the author who bemoans the arbitrary dichotomization of human biology and human culture. Indeed, for those of us who believe that both biology and culture can contribute to our understanding of who we are as a species, this book is an amusing read and a refreshing antidote to the estrangement of the natural and social sciences.
Globe & Mail - Michael Ruse
A good book worth reading.
-Scientific American
Jolly traces four evolutionary transitions in this compelling book and says we are in the early stages of a fifth...The range of things Jolly knows is stunning, and the connections she finds among those things are often startling. She flavors her gripping tale with lines from poems. Occasionally she throws in a joke..[and] she is hopeful that the fifth transition will turn out well.
Booklist - Philip Herbst
In clear and clever prose, Jolly shows us how we got started, what sex had to do with it, and how our brains have become the central force in evolution. With the recent decision of the Kansas Board of Education to play down the teaching of evolution, this may be the time to stock up on good sources that tell the remarkable story of how we became human.
Frans De Waal
One of the best-written, erudite, and informative books I have seen in a long time. Building on her expertise as a primatologist, Alison Jolly addresses an incredible range of topics, from the peculiarities of the Y-chromosome to those of postmodernism. The sex wars are in full swing here, but always presented with balance, humor, and nice bits of poetry.
Sarah B. Hrdy
Alison Jolly is a pioneer in the study of social intelligence and one of primatology's Great Souls. This book is a treasure.
Donna Haraway
Jolly's version of Lucy's Legacy shows a keen intelligence about both sexual and mental life in the compelling worlds of primates. Jolly's accounts mine a deep vein of evolutionary and biobehavioral research to bring the reader into the drama of human evolution and multistranded relation to our near kin. Jolly believes in a rich possible human future for Lucy's descendants. Such visions are crucial in a world that too easily loses track of its biological inheritance. The book's wit alone is worth the price; but best of all, the reader will set the book down with a deeper appreciation of the complexity of primate natures and the richness of our scientific cultures that have let us know more about these important matters.
Don Johanson
If you want to know how you became the most intelligent and sexiest creature on Earth, this is the book for you. Alison Jolly, one of the world's leading primatologists, provokes us to think deeply and clearly about our place in nature--our origins, our primacy on the planet, and even where we may be heading as a species. Written with grace and wit, Lucy's Legacy offers refreshing and challenging insights into what it means to be human.
Times Literary Supplement - Andrew Whiten
[Jolly's] inspiring account of our past and potential future...shows how...the epic story of our evolution can be told as much in terms of co-operative interplay as competition...Jolly guides us through these debates and others with a delightful mixture of common sense, panache, and up-to-date erudition...[Lucy's Legacy] is stuffed with a wonderful array of facts that ground Jolly's assertions.
Times Higher Education Supplement - Phyllis Lee
Jolly has made two of the most significant contributions to paradigm shifts in primatology. She was the first to recognise the social power of females in groups, and she formulated the first statement of the social intelligence hypothesis, which argues that intelligence and mentality are consequences of social opportunities, not by-products of tool use, bipedalism or human language... Lucy's Legacy is beautifully written, elegant, poetic and artistic as well as deeply knowledgeable.
Booklist - Gilbert Taylor
Primatologist Jolly accents the imperatives of reproduction as an evolutionary force, from the australopithecines onward, particularly as an influence on increasing brainpower.
Evolutionary Anthropology - Meredith Small
Lucy's Legacy is really a compendium of all that has been accomplished in animal behavior and evolutionary biology since 1960…Here we have all the major achievements from the past few decades and, taken together, as they are in this book, the whole is impressive…Jolly is at her best when writing about humans.
Technology and Society Science
Mention should be made of the graceful embellishment of the text with poems. A rich tapestry, provocative and fun.
Scientific American
Jolly traces four evolutionary transitions in this compelling book and says we are in the early stages of a fifth...The range of things Jolly knows is stunning, and the connections she finds among those things are often startling. She flavors her gripping tale with lines from poems. Occasionally she throws in a joke..[and] she is hopeful that the fifth transition will turn out well.
Nature
Allison Jolly's book is a refreshing and stimulating account of evolution, and especially the evolution of sex and intelligence in humans and primates. One of its strengths is her presentation of the female view. We men have always had a tendency to consider life from our own perspective...Jolly proposes that the traditional feminine viewpoint on evolution is one of cooperative organization and not of competition. This is the counterpart to the fundamental dilemma for anyone trained in Darwinian evolutionary theory, with its emphasis on rampant individualism.
— Christophe Boesch
Booklist
Primatologist Jolly accents the imperatives of reproduction as an evolutionary force, from the australopithecines onward, particularly as an influence on increasing brainpower.
— Gilbert Taylor
The Independent
This is a book which agrees that nature is often red in tooth and claw, but encourages us to feel good about it all the same...Everybody should understand [sociobiology's] essentials, and Jolly's book provides an excellent outline...She writes with a serenity that is especially pleasing in a field usually harsh with the sound of grinding axes...One of this book's most valuable dimensions is its calm exposition of a worldview which is unequivocally sociobiological, and at the same time sure in its affirmation of feminist and liberal values.
— Marek Kohn
The Guardian
One of the things that makes this book so satisfying is the way it clearly and cleverly gets around the whole nature/nurture question by looking at the complex interplay between a mother and baby, in which each is programmed to learn from the other. This is not what anyone would call headline science: it's just well-written, witty, thought-provoking and full of fascinating detail. You don't learn how to do primatology, but you do learn what kind of primate you are, which is, for most people, more valuable.
— Andrew Brown
New Scientist
[Jolly's] method is to offer a host of lively facts to grip the imagination...All this provides a rich mix, which could have ended up as a convoluted tangle of facts. But Jolly bounds from topic to topic with all the assurance of one of her beloved lemurs...Her book is full of wry, ironic humour, as well as knowledgeable remarks about the way science works...Bolstered by acute analysis of the degree of mental sophistication of the great apes, Jolly produces a convincing reappraisal of the position of male and female in human evolution...Lucy's Legacy has the tone of a wise friend reminding you of things you had forgotten while arranging them for you in a delightful, previously unperceived and revelatory way--and doing this for your edification, rather than for their own glory...Jolly's subject is serious, her erudition profound in a book deft and sure enough to engage even those with the briefest of biological backgrounds. She has pulled off the most elegant of scientific popularisation tricks: being light without being lightweight.
— Adrian Barnett
New York Times Book Review
In Lucy's Legacy, a charming, eclectic and sensible book, [Jolly] argues that while evolution certainly involves competition, the major transitions have arisen through cooperation...With humor and erudition she leads the reader to an understanding of the biology and behavior of primates, through the evolution of intelligence and into 'the age of humanity,' where evolution is charted chiefly by the human mind. Her genius in this informative, satisfying book is to strip away dogma and politics that have shrouded evolution, to reveal a theory Darwin would recognize as his own. 'There is grandeur in this view of life,' he wrote, and here it is seen marvelously.
— Ellen Ruppel Shell
American Scientist
This is an engaging romp through the human story and a thoughtful exploration of who we are as both a biological and a cultural species. Although Jolly covers a considerable diversity of topics in four major sections, each chapter of the story is woven together with a unifying theme of cooperation...Jolly does an elegant job weaving biology, history, art poetry, anecdotes and facts alike to unfold the tapestry of who we are as a species. This book provides a thoughtful review of many decades of research by biologists, primatologists, sociobiologists and evolutionary psychologists, although Jolly's original ideas pepper the discussion. It is an erudite and witty think piece, liberally seasoned with insights and illustrations gleaned from throughout the humanities and sciences--an appropriate blend from the author who bemoans the arbitrary dichotomization of human biology and human culture. Indeed, for those of us who believe that both biology and culture can contribute to our understanding of who we are as a species, this book is an amusing read and a refreshing antidote to the estrangement of the natural and social sciences.
— Joanna E. Lambert
Globe & Mail

A good book worth reading.
— Michael Ruse
Times Literary Supplement
[Jolly's] inspiring account of our past and potential future...shows how...the epic story of our evolution can be told as much in terms of co-operative interplay as competition...Jolly guides us through these debates and others with a delightful mixture of common sense, panache, and up-to-date erudition...[Lucy's Legacy] is stuffed with a wonderful array of facts that ground Jolly's assertions.
— Andrew Whiten
Times Higher Education Supplement
Jolly has made two of the most significant contributions to paradigm shifts in primatology. She was the first to recognise the social power of females in groups, and she formulated the first statement of the social intelligence hypothesis, which argues that intelligence and mentality are consequences of social opportunities, not by-products of tool use, bipedalism or human language... Lucy's Legacy is beautifully written, elegant, poetic and artistic as well as deeply knowledgeable.
— Phyllis Lee
amazon.com
Jolly's book is an outstanding example of how sociobiology has matured. She is feminist in a relaxed, inclusive, open-minded, and undefensive way.
— Mary Ellen Curtin
Evolutionary Anthropology
Lucy's Legacy is really a compendium of all that has been accomplished in animal behavior and evolutionary biology since 1960…Here we have all the major achievements from the past few decades and, taken together, as they are in this book, the whole is impressive…Jolly is at her best when writing about humans.
— Meredith Small
Publisher's Weekly
Princeton primatologist Jolly brings good news from prehistory and delivers it with style. Jolly argues that human development is not the story of battle after battle to determine survival of the fittest. Instead, she portrays evolution as a story of ever-increasing cooperation. Jolly proves an illuminating guide to the complex intersection of nature and nurture. In this accessible, comprehensive and thought-provoking work, Jolly also adduces surprising texts from the humanities....
Publishers Weekly - Publisher's Weekly
Princeton primatologist Jolly brings good news from prehistory and delivers it with style. Neither evolutionary theory nor sociobiology, as popularly understood, flatter humanity. Evolution paints a grim picture of survival of the fittest, and sociobiology has more than a few sexist implications. Jolly argues that human development is not the story of battle after battle to determine survival of the fittest. Instead, she portrays evolution as a story of ever-increasing cooperation. Not that she doesn't take into account the myriad ways in which nature, including human nature, is red in tooth and claw. She does, but she also insists that "[t]he fascination of sociobology is not [in the] repugnant actions that it can explain," but "in understanding how loving families and supportive communities could grow from such unpromising ground." Jolly considers neo-Darwinian explanations of human feelings and decisions, from white lies to charitable giving to abortions. As she moves from discussions of human culture (from sex-testing of female Olympic athletes to Freud's ideas about sexual development) to her own research among the lemurs of Madagascar, Jolly proves an illuminating guide to the complex intersection of nature and nurture. In the second half of the book, she first examines different primate societies before moving on to a discussion of how human individuals and communities develop, including the evolution of gender, tool use, abstraction, imagination and cooperation. In this accessible, comprehensive and thought-provoking work, Jolly also adduces surprising texts from the humanities, among them poems in translation from French, Chinese and Yoruba. (Nov.) Copyright 1999 Cahners Business Information.
Library Journal
Those who study human evolution put forth many different theories concerning the qualities that distinguish humans from other species and have made our enormous impact on Earth possible. Recently, Ian Tattersall's Becoming Human: Evolution and Human Uniqueness (LJ 2/1/98) summed up many of these theories, emphasizing symbolic thought, art, and innovation. Jolly, an eminent primatologist, suggests that enhanced cooperation, social behavior, and the division of labor also have played significant roles. Unlike Tattersall, Jolly is sympathetic to a sociobiological approach, which emphasizes the role of evolution-influenced instinct as both an asset and a problem for our species; she provides many interesting insights based on her knowledge of primate intelligence and behavior. She also discusses some interesting fossil evidence of paleontology, muses over the views of various factions on human evolution, and speculates on the future of our species and of our planet. An interesting, well-written, and well-documented book, this would be an asset to public and academic libraries.--Marit MacArthur, Auraria Lib., Denver Copyright 1999 Cahners Business Information.
New York Times Book Review
Her genius and eruditation she leads the reader to an understanding of the biology and behavior of primates, through the evolution of intelligence and into "the age of humanity," where evolution is charted chiefly by the human mind. Her genius in this informative, satisfying book is to strip away dogma and politics that have shrouded evolution, to reveal a theory Darwin would recognize as his own.
—Ellen Ruppel Shell
Kirkus Reviews
A primatologist's musings on evolution, with special attention to the myriad changing roles of the sexes and to the development of intelligence and human interdependence. Jolly is a visiting lecturer at Princeton. She tells a good tale in her quest to explain where we came from and where we're headed ("Biology offers an increasingly coherent view of human nature and humanity's place in nature"), and she shows us that "human interdependence grew with our species' history, and now gallops forward to engulf the biosphere." The driving force of evolution, she argues, is the building of larger organisms that serve "the self-interest of their component parts." After laying out her idea of evolution, Jolly looks in part two at "Wild Societies." What behaviors do we have in common with other animal groups? What can we learn from them about ourselves? How did our interactions with other animal groups spur the development of human intelligence? "Developing a Mind," part three, looks more deeply into the evolution, individual and species-wide, of intelligence, including growth from embryo to adult. And finally, in part four, "The Age of Humanity," Jolly describes how culture develops and how we move continually from acting as individuals to acting in groups. Her final chapter speculates on where we're headed: One educated guess is that we may be moving toward the development of a global organization, or organism. "Such an organism would be a new biological synthesis, as cells and bodies once were, directed in part through conscious human purposes." Jolly enlivens her instruction with snippets of poetry and other writings (from Dorothy Parker to Mallarmé), and her own colorful prose("Scientists are indeed fallible. We depend on our social context like a litter of puppies. We can't survive without the mothers' milk of praise, preferably accompanied by the regurgitated meat of funding"). Jolly is an enthusiastic guide; she has fun with all this, and readers will too. (30 illustrations)
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Product Details

  • ISBN-13: 9780674005402
  • Publisher: Harvard University Press
  • Publication date: 5/31/2001
  • Pages: 530
  • Sales rank: 1,079,943
  • Product dimensions: 1.07 (w) x 6.14 (h) x 9.21 (d)

Meet the Author

Alison Jolly is former president of the International Primatological Society.
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Read an Excerpt




Chapter One


The Evolution of Purpose


We evolved. We have only to look at the pouting face of a young chimpanzee to laugh at its reflection of ourselves. We know that more than 98 percent of our genes are shared with the chimpanzee, but we feel the kinship directly when the furry baby puts up its arms to be held.

    Still, we are very reluctant to credit chimps with that most human quality, a sense of purpose. Surely no ape ever asked why it is here, what it evolved for? Somewhere in the progress from ape to human, the first philosopher appeared. Every human society we know of has asked, and offered some answer to, the question "What for?" Chimps do not puzzle over that question, but, strangely, they help us confront an even more abstruse one: Why do we ask what for? Why do we feel that the world and our own existence must have a purpose?

    When we were evolving human minds, the environment posed many challenges. We had to find, recognize, and remember foods that were growing erratically about the savanna. We invented tools to smash nuts, dig for roots, and hurl at prey. We dodged saber-tooth cats and competed for food with troops of gigantic baboons. However, similar challenges confronted other primates. All animals have predators, competitors, and prey. What was different for us?

    The difference was that we lived in social groups of creatures just about as smart as ourselves. Our minds were honed in a social nexus generation by generation. We outsmarted rivals of our own sex by forming alliances withour friends against other networks of allies. Both males and females chose mates from a range of suitors. One way to be chosen was to be smart—smart at providing food, or distracting rivals, or wooing with primeval forms of music and rhetoric. Endearments—and insults—may have been among the earliest parts of speech. At some much disputed period we developed rights and commitments to particular mates, and affection and obligations toward both of our parents. Juggling relationships is the stuff of soap operas, but it made us smarter. Captive chimpanzees and bonobos love watching soap operas.

    The pressure of others' intelligence drove our minds in a forward spiral. We gained advantages for ourselves and our children whenever we could predict the actions of others, both friends and foes. The efficient way to predict a live creature's actions is not to do abstract, billiard-ball deductions about where it came from or which way it is headed but to ask what the chimp or dog or baby wants. In the long (Darwinian) run, we all want to survive and reproduce. All animals have developed a baroque collection of subroutines en route to this end. I want to eat a carrot or a chocolate chip cookie that is tempting me now, not because it builds vitamin-rich tissue or energy to bring up the kids. We enjoy sex for its own sake, now, not to make a baby nine months down the line.

    A primate does not need to go beyond these immediate subroutines to sense that a rival "wants" to dig up the root I spotted, she "wants" to take the last cookie on the tray, she "wants" to cuddle up to the male I had my eye on. If a more subtle ape sees these things a little more clearly than the next ape, she may be a little more likely to turn the tables and gain her own ends. Then, somewhere along the trail of the generations, she becomes able to detach herself enough to think of her own behavior in such terms. At this point we drop the scare quotes; these are real goals, not just felt desires. Eventually the goals become Machiavellianly explicit: "He'll never see what I'm up to behind the bushes," or "I'll encourage her to grab that gooey cookie so he will see that I am pure but generous and she is a selfish slob," or "OK, I'll bite the cookie with gusto, and eye him over the top so he'll imagine enjoying other pleasures."

    The chimp and its society tell us that our minds are shaped by the world of our ancestors. In that world, other ape-people were filled with purposes. From the purposefulness of our fellow humans we leap to the assumption that everything has a purpose. Richard Dawkins says, "It is almost as if the human mind has been designed to misunderstand Darwin." Too right. We have evolved a social primate's mind that looks for purpose in everything.

    The thought that nature itself might have no purpose was anguish in the nineteenth century, as it is to many today. The extinction of species raised the sacrilegious prospect of humanity itself as one more transient life form. Would we too be cast off by nature's indifference? Alfred, Lord Tennyson distilled that anguish in his elegy In Memoriam, which became so famous that even Queen Victoria kept it by her bedside. Man, last of nature's creations, so full of hope and splendid purpose,


Who trusted God was love indeed
And love Creation's final law—
Tho' Nature, red in tooth and claw
With ravine, shriek'd against his creed—


even Man might become shards of fossil bone, finally left to


Be blown about the desert dust,
Or seal'd within the iron hills.


Darwin's Decision


Charles Darwin hesitated for twenty years before publishing his theory of evolution through natural selection in 1859. He was not idle, nor indifferent, nor unconscious. His early notebooks spelled out the whole theory in 1838. He occupied eight of the intervening years with prodigious labor on the anatomy of barnacles. Barnacles!—with the theory that would change humanity's view of itself already written, with instructions to publish if he should die. He hid his blasphemous idea in part because of the anguish it would cause to believers, including his own wife, if he could successfully explain the evolution of living forms without recourse to divine purpose. He also hid through fear of revenge on his social position and scientific respect.

    Then in 1858 Alfred Russel Wallace wrote a short letter from Indonesia outlining the principle of natural selection in a few pages. It finally catapulted Darwin into publishing a 500-page "preliminary sketch" of evidence for his theory.

    On the Origin of Species by Means of Natural Selection, or The Preservation of Favoured Races in the Struggle for Life was far from the first book to propose the evolution of one form from another. Charles Darwin's grandfather, Erasmus Darwin, had done so, as had the French naturalist Lamarck and the Scot Robert Chambers. Evolution was in the air, along with the innovations and extinctions it implied. Tennyson's poem was published nine years before the Origin of Species. What Darwin did was give evolution a mechanism, a means of arriving at the diversity of living and fossil creatures without the intervention of conscious purpose. The philosopher Daniel Dennett calls this the difference between skyhooks and cranes. Evolution was no threat if a benevolent deity leaned over from on high with a skyhook to haul life upward for his own divine ends. When Darwin proposed instead a kind of crane, a physical means of building life's complexity from the ground below, it was horrifying.

    Darwin was a proper Victorian gentleman. He aspired to the respect of the illustrious scientists who ran the Geological Society of London, men who damned Lamarck for his "gross and filthy" views on evolution. Biology in Darwin's time was almost exclusively natural history—gentleman's beetle collecting, the hobby that sent Darwin cycling round the countryside when he was supposed to be studying for the ministry at Cambridge University. Gentlemen belonged to the established Church of England. Their God personally designed every single species of beetle. As a theology student, Darwin read and reread Paley's Natural Theology, or Evidences of the Existence and Attributes of the Deity, Collected from the Appearances of Nature. Paley said that if, by chance, he kicked a stone on his path, he might assume it had lain there forever. If, however, he found a watch, he would know at once that someone had made it, and that its parts were put together for a purpose. Plants and animals, in turn, are far more complex and more beautiful than any watch. Therefore they must have arisen by divine design, not mere chance. Paley's God, the God of the scientific establishment, shared a major strand of Darwin's own character—delight in every fact and facet of living nature.

    Darwin was not born a grand old man with a beard. During the voyage of the Beagle he rejoiced with a young man's gusto in riding off through South America toward the Andes in pursuit of discoveries (though he never got over being seasick on shipboard). When he came home to London he was a bachelor-about-town, seeing much of his brother Erasmus and Erasmus's friends, especially the literary lioness Harriet Martineau. Martineau overcame the handicaps of being female, single, ugly, and deaf to write immensely popular political fiction. One of her soap-opera morality tales explained Thomas Malthus's principle that human population grows at compound interest unless checked by famine, war, disease, or moral restraint. Meanwhile, mobs rioted in the streets against the Malthus-inspired New Poor Law of 1834, which sent the destitute to workhouses made as harsh as possible to discourage paupers from seeking aid. Parliament justified the new Poor Law by quoting Malthus: the superfluous poor should be checked from reproducing.

    The idea of the theory of natural selection came to Darwin when he was reading Malthus "for amusement." He doubtless discussed Malthus's ideas with Martineau and others of their London circle. Their background, like his own family's, was mercantile, not aristocratic, These entrepreneurs dealt in the laws of gravity, steam power, and compound banking interest as well as compound population growth. Darwin became an increasingly explicit atheist. He turned from the God who sculpted each beetle carapace to the abstract grandeur of universal law.

    Evolution itself called to the hopes of the rioting mob. The idea that species could arise one from another appealed to a working-class audience—men who went to public lectures and night schools in the hope of self-improvement. If species themselves were mutable, so might a working-class Englishman hope to rise in station. If the history of life was one long march of progress, even laborers, or society itself, could expect to advance toward a better life. This doctrine was revolting to the wealthy classes, with their vested interest in the status quo—revolting, and revolutionary. Darwin's friends repeatedly warned him that espousing evolutionary progress would ally him with riffraff that the gentleman scientists despised.

    These three strands came together in the final theory: awe and delight at nature's diversity, explanation how that diversity of nature arose through a grand and simple law, and understanding that the law of natural selection at last explained evolution of new species and indeed the progress of life itself.

    Natural selection is simple. Richard Dawkins remarks it is so simple that if we did not have a deep-seated distrust of mechanism we could hardly have waited millennia to come up with the idea. Indeed, Aristotle almost did, proposing that perhaps all possible forms had once existed, including monsters like "man-faced oxen." Then only those that were best fitted for life survived. Aristotle then veered away, seeing no way to produce the variety of such monsters in the first place. He concluded that all parts of living organisms arose both through mechanical "prior cause" and for a purpose "as leaves exist in order to shelter the fruit."

    After twenty years of labor, Darwin could summarize the "prior cause," the actual mechanism of natural selection, in one paragraph. He kept the last paragraph of his masterpiece unchanged through all successive editions of the Origin:


It is interesting to contemplate an entangled bank, clothed with many plants of many kinds, with birds singing on the bushes, with various insects flitting about, and with worms crawling through the damp earth, and to reflect that these elaborately constructed forms, so different from each other, and dependent on each other in so complex a manner, have all been produced by laws acting around us. These laws, taken in the largest sense, being Growth with Reproduction; Inheritance, which is almost implied by reproduction; Variability from the direct and indirect action of the external conditions of life, and from use and disuse; a Ratio of Increase so high as to lead to a Struggle for Life, and as a consequence to Natural Selection, entailing Divergence of Character and the Extinction of less-improved forms. Thus, from the war of nature, from famine and death, the most exalted object which we are capable of conceiving, namely, the production of the higher animals, directly follows. There is grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved.


Darwin's "Laws Acting Around Us"


    Self-maintenance, growth, and reproduction. The most fundamental property of life is active self-maintenance. Living things work to stay alive. They take in nourishment, repair themselves, and grow. But as soon as some accident, predator, or disease destroys a living thing, it is gone. If it has left no descendants, its genetic information is gone. If it has influenced no others, its ideas are gone. Working to stay alive can work only for a finite time. Leaving extra copies of oneself guards against such total annihilation. The second fundamental property of life, then, is reproduction. Life began, by definition, when the first chemical molecules that could make copies of themselves condensed from the primordial ooze.

    This fact that living things have the potential to grow and reproduce is what is wrong with the Gaia hypothesis that Earth itself is a living organism. Granted, Earth in some ways seems extraordinarily like a self-regulating system, like a living thing. James Lovelock, who proposed the idea in 1979, showed that marine algae produce a gas called dimethyl sulfate, which promotes cloud formation, partially regulating Earth's temperature. Most Darwinians thought this could hardly be selected for in evolution: what is the profit in it for the algal genes? However, if algae blooms are massive clones, then promoting clouds would allow their own genes to disperse—a reproductive advantage for the makers of the weather. Perhaps the self-interest of algae stabilizes temperature and climate in such a way that the rest of us can survive.

    Yet, so far as we know there is only one Earth, which neither grows nor reproduces. Even though the parts look suspiciously well coordinated, we still know of no mechanism that produces complex natural organization on the scale of the biosphere itself. Et could be that the coordination is a case of observations in search of a theory, much like the data of continental drift, which were not believed until people recognized the mechanism of sea-floor spreading and plate tectonics. Or it could be that the notion of Earth as organism just is not viable. Meantime, the simplest amoeba or bacterium has the first properties of life: self-maintenance, growth, and reproduction.

    Inheritance. Darwin talked about reproduction not of genes but of parents' form and behavior. He did not know about genes, chromosomes, DNA. However, it was obvious to Darwin that natural selection could not work unless offspring inherited tendencies to develop the traits that made their parents successful.

    Darwin worried about the problem of blending inheritance. Supposing, he wrote, that a white man were shipwrecked on an island with a black population. His offspring would be mixed, their offspring more so. If the genetic information were blended and dispersed, like a drop of water added to a bottle of ink, it is impossible that in some future generation a child would reassemble all the "white" genes and look like her shipwrecked ancestor. Suppose, however, that genetic information is not blended but rather the genes are shuffled and dealt like cards in a game of bridge. It is statistically no more unlikely for all the hearts to fall together than any other of the possible sequences of thirteen cards. With enough shuffling, children in a limited population could partially or wholly recreate some ancestral genetic pattern, as, at times, the offspring of a white South African couple show black background long since successfully denied in their forebears' past. This is called particulate inheritance. In the first edition of the Origin Darwin rejected blending inheritance, but eventually even he lost faith in particulate inheritance and watered down later editions. Not until the rediscovery of Gregor Mendel's work on genetics was blending inheritance finally put to rest.

    Mendel was an Austrian monk, a high school teacher, and a biologist who published just two papers in 1866 on the outcome of crossing peas. He annotated his copies of Darwin's works and saw how his own experiment fit with natural selection. He focused on a few characteristics: tall plants versus short plants, yellow versus green peas, wrinkled peas versus smooth—seven traits in all. He found that first-generation offspring all resembled one parent, the "dominant" one for each characteristic. In the second generation, they came out in the ratio of three to one, where the odd one inherited two recessive factors for the trait. Of the three with dominant characteristics, one had two dominant factors and the other two had a dominant and a recessive, but the dominant factor determined the look of the adult plant. The important point, to Mendel, was that the traits segregated independently from one another. He postulated that whatever factors produced the traits were sorting digitally and independently, like shuffled cards, not blending like a liquid.

    Very few characteristics in humans are as genetically simple as Mendel's pea plants. Our major blood types, A, B, AB, O, are based on single gene differences, but not much else is. Sex begins with a single gene difference, but sex is one of the very few traits where we have distinct castes: most people are either male or female. Most of the interesting traits, such as intelligence, involve an astronomically complex interaction of many genes with the environment. The basic principle, though, is that genes are discrete, particulate. That means that the information to rebuild parents' characteristics can pass intact from generation to generation.

    Variability. For natural selection to work, individuals must differ within a population. If the line of descent consisted of perfect clones, no individual would be genetically better adapted to its environment than any other. Some would be lucky enough to survive while others died, but this produces no change in the genetic stock. Darwin pointed out that in fact puppies differ even within one litter; fancy show pigeons differ within an inbred strain. Evolution is not about the perpetuation of some static ideal type but about the differences and innovations that give some few individuals an edge in the struggle for life.

    Darwin equivocated between what Ernst Mayr calls "hard" and "soft" inheritance. Hard inheritance is what we now know to happen: Mendel's mutations occur randomly within the genome, and changes in the genome are transmitted to offspring. Environmental conditions that reach the genes are random mutagens, like ultraviolet light, mustard gas, atomic radiation, which hit the DNA like a scatter of shotgun pellets. Soft inheritance instead would allow external conditions to shape particular heritable factors, both directly, indirectly through increasing variability, and above all, through use and disuse of parts of the body—the so-called Lamarckian heresy. Lamarck's notion was that the giraffe, stretching its neck to reach tall trees, somehow stretched the neck of its unborn young. Hard inheritance says, instead, that taller giraffes swiped off leaves from tall trees out of reach of their shorter kin, and so survived to better sire and bear giraffe calves who inherited the parents' gangly genes.

    It remained for August Weismann, at the end of the nineteenth century, to sort the story out and to place hard inheritance on a firm theoretical and empirical basis. He pointed out that many adaptations could not have arisen from habit or use during animals' lives—they are too complex, or their benefit happens after the animal is dead, or they produce highly adapted nonreproductives, such as the sterile castes of insects. Among a wealth of other observations and experiments, Weismann is remembered today for cutting off the tails of generations of mice. The distant offspring grew tails as long as ever, in spite of their parents' "disuse" of any tail. Only when Weismann interbred the naturally (genetically) short-tailed mice of his stock, generation after generation, did the descendants eventually inherit genes for puny tails. We now imagine only a mad farmer's wife would carry out this procedure, but Weismann recalled how he faced critics who believed that puppy dogs did indeed inherit their mothers' docked tails, and that "even students' fencing scars were said to have been occasionally transmitted to their sons, though happily not their daughters."

    Josef Stalin tested out Weismann's findings on a grand scale. Stalin had power to experiment on a whole nation's bread and borscht and vodka. The biologist Lysenko launched an attack on a flourishing Russian school of genetics in 1936, achieved full triumph in 1948, and did not fall from power until 1965. Lysenko argued that crops could acquire the habit of growing well for Communism. They should be fertilized and tilled, just as peasants should receive political education. It was immoral, according to Lysenko and Stalin, to save only elite seeds to sow. The crops' genetic stocks declined through lack of selection, playing a part in the collapse of Soviet agriculture, while Soviet evolutionary biology lost two decades of growth, as "hard" geneticists were fired, imprisoned, or killed.

    A ratio of increase so high as to lead to a struggle for life. This is Malthus's principle that every organism is capable of reproducing by exponential growth. This means every species can produce more offspring than have room to live in a finite habitat. Malthus's principle, acting on inherited variability, is the key to natural selection. If many more offspring are born than can possibly survive, those less well adapted to their environment will automatically be culled. In the same way, a purposeful human breeder produces new strains by saving only a few of each generation and culls those that do not measure up to the breeder's ideal. Malthus's principle is not so much about life as about the inevitability of death—the myriad shadowy might-have-beens.

    Natural selection. The sum of all these elements gives the mechanism of natural selection, "entailing divergence of character and the extinction of less-improved forms." The actual divergence of character comes from tracking the environment. As a few individuals of a litter, or a species, are genetically better at coping with the environment, they drive their competitors to extinction. In this way the species as a whole is "improved" in relation to its environment, but through a wholly mechanical means, and through the self-interest of each organism in its own survival. There is no judgment about what constitutes "improvement." A parasitic barnacle which jettisons all adult organs except the gonads and feeds by sucking nutrients from a crab, its host, is improved if it survives to reproduce.


The War of Nature


Even in this triumphant final paragraph Darwin talks of the war of nature, of famine and death. Competition for him includes direct competition, as of two plants sucking water and nutrients from each other's roots, racing up toward the sun' the winner shades and shrivels the weaker. He also speaks of competition against the onslaught of the environment' to be the plant that can best stand the desiccation of the desert edge, or the frosts of winter. Competition, unthinking cruelty, the driving of others to death or extinction are the basis of natural selection of the few which survive.

    Yes, it does sound a lot like nineteenth-century capitalism. Competitive individuality is the basis of natural selection, and of that brand of economics which believes in a free market, an idealization of individuality rarely or never found among actual human transactions. Humans recognize other individuals and cooperate, or at least cut deals, with those they know. It turns out that the major advances in evolution also involve cooperation.

    What do we mean by an advance? A very simple yardstick is size. Single cells are bigger than bacteria, multicellular bodies are bigger than single cells; societies are bigger than single bodies. Size usually implies complexity, as the number of different interacting parts grows from level to level. Each level involves a community of the simpler individuals of the level below.

    Cells originated as a community of originally free-living bacteria. Bodies are communities of mutually supportive cells. Societies, obviously, are a somewhat coordinated community of individuals. The great transitions in evolution have produced ever larger matrices of cooperation. In this sense there has been a genuine directionality in evolution, toward more and more complex interconnection. If we wish to think that complexity is indeed an improvement, we may call it progress.

    How does such cooperation arise from the fierce competition of natural selection? Cooperation arises between biological entities much as it arises between people. It is advantageous to both partners, or else one imposes itself on another and forces the second to obey. Natural selection is built on individual advantage. The agony or futility of the crab being sucked of its vital juices by the parasitic barnacle, the human being in spasmodic dehydration by cholera bacilli, or the rabbit skewered by an eagle's talons are unjudgmentally produced by the blind forces selecting for individual survival of barnacle, bacillus, eagle. But love, altruism, self-sacrifice are also real and have also evolved and survived, not just in ourselves. The lesson of Darwin's war of nature is not that unfettered selfishness is somehow good but that by understanding the war of nature we can also understand kindness and love in the natural world.


From So Simple a Beginning


Darwin surmised that present living things stem not from a few forms but from one. All of us construct our bodies using the same genetic code. The code has long been considered highly arbitrary, what Francis Crick called a "frozen accident." Recently, biologists are figuring out some of the chemical constraints that may have shaped the code's early evolution, and also finding that the code is extraordinarily efficient, more efficent than the artificial permutations that we can now jam into it, or simulate by computers. This means that the code itself evolved over time. Perhaps the ancestor who had the code we all use now was the fittest survivor among many early life forms, or perhaps those simple life forms exchanged components among themselves, and jointly converged on the pattern of our universal ancestor, the progenitor of you, me, the earthworm under your foot, the pigeon over your head, and the cold virus inside you.

    Some still consider natural selection only a hypothesis to be tested, although even the Pope now concedes that it is a "theory of vast explanatory power." Darwin claimed even more: that natural selection would prove to be a universal law of nature, an organizing principle like Isaac Newton's law of gravity. "There is grandeur in this view of life," he wrote, in awe of nature as majestically simple, whose universal laws explain the swarming embodiments of reality. In the end, Darwin was buried in Westminster Abbey, near the monument to Newton, England's hero of science.

    Paley's test of the watch on the moor is trivial compared to the complexity of the merest beetle, even the merest cell. The DNA in each cell of a person contains as much information as an encyclopedia. And that is only the blueprint—the code to produce the interacting proteins that build the scaffolding that builds the structure. The final structure of a living thing is as much more complicated than its DNA as a cathedral is more complicated than the architect's blueprint. How can such things arise without a planned design?

    The key is not just natural selection but cumulative selection. Each step of survival does not start from a blank and random slate but from a previous parental blueprint already evolved over millions of generations. The embryo does not construct itself from scratch, like a tornado in a junkyard somehow producing a Boeing 747, to use Richard Dawkins's analogy. Instead, each change is a minor tweaking of a previous body plan. A few changes are larger—repeating a body segment, for instance—but it is extraordinarily rare that individuals carrying large single steps of modification survive. Dennett's "crane" building up from below is building itself, on itself. The mechanism of reproduction, inheritance, variation, struggle for life is enough, when building on what went before.

    Darwin's own test case was the evolution of the eye in all its precision. Generations of scientists have now traced the evolution of eyes. Each step was selected in turn, from the first light-sensitive pigment spot that might have registered the shadow of a swimming predator, up to the single-lens reflex of ourselves or, independently, the octopus, or the very different array of compound and simple eyes that a jumping spider uses to target its prey. It seems that eyes have evolved independently at least thirty times over. But even eyes are jettisoned when they are no longer useful. The mole rat's remnant eye is buried beneath skin and fur. Its brain circuits are rerouted to deal with the tingling of its vibrissae and to decode the sound of messages sent by other mole rats thumping their skulls against the roofs of underground tunnels.

    The same principle explains a great deal of the fine tuning in nature: enough of an enzyme, but not too much, fast enough legs to outrun the predator most of the time, but not legs like the cheetah, unless you are a cheetah. And cumulative selection does fine in explaining the presence, and even the absence, of the amazing eye.


Forms Most Beautiful and Most Wonderful


The entangled bank of "most beautiful and most wonderful" forms does not become simple and drab just because it has evolved through the fixed law of natural selection rather than divine intervention. Darwin certainly did not think so. Once he had found the mechanism of evolution, he did not feel there was no more to see or to say. He led a life of perpetual fascination with natural forms and behaviors: earthworms, barnacles, orchids, pigeons, peoples. His metaphors inspired the great literary minds of his time, and Darwin's image of the entangled bank remains with us today.

    The idea that science reduces the wonder of nature to sterile abstraction is the fallacy of reductionism. Nature is not "nothing but" a DNA blueprint, or atoms, or quarks. A Gothic cathedral is a pile of stones, pressing down upon one another according to the fixed law of gravity, with the addition of a design inspired by the architect. A Madagascar landscape of pinnacle karst—knife-tipped needles of limestone soaring 150 feet into the air—is as breathtaking as a Gothic cathedral. It too is a pile of stone, inspiring the beholder but shaped only by gravity and gravity's handmaid, erosion.

    The idea that either cathedral or karst pinnacles are "nothing but" stone leaves out their form. A full description must include the architecture. The shape of a thing is no mystical essence, but it is not reducible to the materials which take that shape. A white sifaka, one of the glorious tribe of Madagascar lemurs, which dances over the ground and springs fifteen feet at a bound between branches and makes its home in hanging gardens among the pinnacles, is not "nothing but" molecules. Neither is it molecules imbued with some vital fluid of mystic life force. It is an architecture of molecules shaped by natural selection, just as the pinnacles are shaped by erosion. It is a sifaka.

    Does wonder depend on ignorance? Is science merely Edgar Allan Poe's "vulture, whose wings are dull realities"? Or are we allowed to ask how the rain grooved the pinnacles, how the sifaka's wide eyes detect the predator, the nerves' electricity signals the leap, and the muscles contract as it springs in the air? Can we see how swooping hawks and the ravenous fossa (a giant, cat-clawed mongoose) provided the selection pressure that led to lemurs who leaped in time to survive? Does the sifaka become less wonderful if we imagine the layers of complexity in muscle and nerve and gene?

    Our wonder itself is a product of natural selection. The emotions of wonder and of beauty evolved. They are an integral part of every human mind. Does that mean they are "nothing but" chemical products, like sugar and vitriol? The feelings, like the sifaka's leap, exist. Even if we succeed in understanding how they are produced, explanation does not explain them away.

    This brings us back to the beginning. Evolutionary explanation gives us clues why we see the world in terms of purpose. Natural selection of bodies that survive refined the brains of social primates into minds that want consciously to survive, that think in terms of purposes. We see purpose in our comrades, in other living creatures, even in lifelike manifestations such as thunderstorms and cars and computers.

    We have no proof whether there is a larger purpose in the universe or not—or perhaps it is fairer to say that some of us see no proof, while many others do. We may or may not have free will to choose between the courses of action offered up in the conscious part of our minds. All that is a larger metaphysics, an argument which has lasted three thousand years or so and will likely continue. Perhaps most can agree, though, that our own conscious purposes are real. A biological explanation of how the brain works, how the nerves offer up thoughts on our mental screen, does not deny the thoughts are there. That would be like saying if we understand the nerves and muscles and evolutionary history of the sifaka's leap, then suddenly the poor beast can't jump.

    Our human sense of purpose is a product of our biological heritage; it now is changing the biology of the world around.

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Table of Contents

  • Prologue: Beyond the Copper Beech Tree
  • I. Evolution
    • 1.The Evolution of Purpose
    • 2. Life, Sex, and Cooperation
    • 3. Sex—Why Bother?
    • 4. Courtship and Choice
    • 5. Calculating Love


  • II. Wild Societies
    • 6. Women in the Wild
    • 7. Lemurs, Monkeys, Apes
    • 8. Human Apes
    • 9. Apish Intelligence


  • III. Developing a Mind
    • 10. Organic Wholes
    • 11. A Gendered Body
    • 12. Instinct, Learning, and Fate
    • 13. Thinking
    • 14. Speaking Adaptively
    • 15. Are Babies Human?


  • IV. The Age of Humanity
    • 16. Feet First, Brains Later
    • 17. Demanding Control
    • 18. The Global Organism


  • Notes
  • References
  • Index

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