Nature, Nurture and Liberal Values _ Prospect Magazine

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    Features

    Nature, nurture and liberalvalues

    ROGER SCRUTON 25TH JANUARY 2012 ISSUE 191

    Biology determines our behaviour more than it suits many to

    acknowledge. But peopleand politics and moralitycannot be

    described just by neural impulses

    The window to the soul or just acollection of cells? Transition 5

    (detail) by Susan Aldworth

    Beyond Human Nature by Jesse Prinz (Allen Lane,

    22)

    Incognito by David Eagleman (Canongate, 20)

    You and Me: the Neuroscience of Identity by SusanGreenfield (Notting Hill Editions, 10)

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    Human beings are diverse and live in diverse ways.Should we accept that we are diverse by nature, having

    followed separate evolutionary paths? Or should we

    suppose that we share our biological inheritance, but

    develop differently according to environment and

    culture? Over recent years scientific research hasreshaped this familiar nature-nurture debate, which

    remains central to our understanding of human nature

    and morality.

    For much of the 20th century social scientists held that

    human life is a single biological phenomenon, which

    flows through the channels made by culture, so as to

    acquire separate and often mutually inaccessible forms.Each society passes on the culture that defines it, much

    as it passes on its language. And the most important

    aspects of culturereligion, rites of passage and lawboth unify the people who adhere to them and divide

    those people from everyone else. Such was implied by

    what John Tooby and Leda Cosmides called the

    standard social science model, made fundamental to

    anthropology by Franz Boas and to sociology by mileDurkheim.

    More recently evolutionary psychologists have begun to

    question that approach. Although you can explain the

    culture of a tribe as an inherited possession, they

    suggested, this does not explain how culture came to be

    in the first place. What is it that endows culture with its

    stability and function? In response to that question theopinion began to grow that culture does not provide the

    ultimate explanation of any significant human trait, not

    even the trait of cultural diversity. It is not simply that

    there are extraordinary constants among cultures:gender roles, incest taboos, festivals, warfare, religious

    beliefs, moral scruples, aesthetic interests. Culture is

    also a part of human nature: it is our way of being. Wedo not live in herds or packs; our hierarchies are not

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    based merely on strength or sexual dominance. We

    relate to one another through language, morality and

    law; we sing, dance and worship together, and spend as

    much time in festivals and storytelling as in seeking our

    food. Our hierarchies involve offices, responsibilities,

    gift-giving and ceremonial recognition. Our meals areshared, and food for us is not merely nourishment but an

    occasion for hospitality, affection and dressing up. All

    these things are comprehended in the idea of culture

    and culture, so understood, is observed in all and only

    human communities. Why is this?

    The answer given by evolutionary psychologists is that

    culture is an adaptation, which exists because itconferred a reproductive advantage on our hunter-

    gatherer ancestors. According to this view many of the

    diverse customs that the standard social science model

    attributes to nurture are local variations of attributes

    acquired 70 or more millennia ago, during the

    Pleistocene age, and now (like other evolutionary

    adaptations) hard-wired in the brain. But if this is so,

    cultural characteristics may not be as plastic as the

    social scientists suggest. There are features of the

    human condition, such as gender roles, that people

    have believed to be cultural and therefore changeable.

    But if culture is an aspect of nature, cultural does not

    mean changeable. Maybe these controversial features

    of human culture are part of the genetic endowment of

    human kind.

    This new way of thinking gained support from the

    evolutionary theory of morality. Defenders of nurture

    suppose morality to be an acquired characteristic,

    passed on by customs, laws and punishments in which

    a society asserts its rights over its members. However,

    with the development of genetics, a new perspective

    opens. Altruism begins to look like a genetic strategy,which confers a reproductive advantage on the genes

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    that produce it. In the competition for scarce resources,

    the genetically altruistic are able to call others to their

    aid, through networks of co-operation that are withheld

    from the genetically selfish, who are thereby eliminated

    from the game.

    If this is so, it is argued, then morality is not an acquired

    but an inherited characteristic. Any competitor species

    that failed to develop innate moral feelings would by now

    have died out. And what is true of morality might be true

    of many other human characteristics that have

    previously been attributed to nurture: language, art,

    music, religion, warfare, the local variants of which are

    far less significant than their common structure.

    I dont say that view of morality is right, though it has

    been defended by a wide variety of thinkers, from the

    biologist John Maynard Smith (its original proponent) via

    the political scientist Robert Axelrod to such

    popularisers as Matt Ridley and Richard Dawkins. But

    even if morality is a partly acquired characteristic that

    varies from place to place and time to time, it might stillrest on innate foundations, which govern its principal

    contours.

    Noam Chomskys speculative linguistics has proved

    enormously important in this debate, since language is

    at the root of culture in all its manifestations: it is a

    paradigm case of a social activity that entirely changes

    the relationships, capacities, knowledge and the world ofthose who engage in it. Yet there could be no

    explanation of language that regarded it merely as a

    socially transmitted trait, with no deeper roots in biology.

    The rapid acquisition of language by children, at the

    same rate in every part of the globe, and on the same

    paucity of information from the surroundings, suggests

    that there is an innate universal grammar, to which each

    child attaches the fragmentary words and phrases that

    strike his ear, to generate new and intelligible utterances

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    of his own. What Steven Pinker has called the language

    instinct is implanted by evolution, which endows each

    child with mental competences that are common to our

    species.

    If we follow the evolutionary biologists, therefore, we

    may find ourselves pushed towards accepting that traits

    often attributed to culture may be part of our genetic

    inheritance, and therefore not as changeable as many

    might have hoped: gender differences, intelligence,

    belligerence, and so on through all the characteristics

    that people have wished, for whatever reason, to rescue

    from destiny and refashion as choice. But to speculate

    freely about such matters is dangerous. The oncerespectable subject of eugenics was so discredited by

    Nazism that dont enter is now written across its door.

    The distinguished biologist James Watson, co-

    discoverer of the double helix structure of DNA, was run

    out of the academy in 2007 for having publicly

    suggested (admittedly in less than scientific language)

    that sub-Saharan Africans are genetically disposed to

    have lower IQs than westerners, while the economist

    Larry Summers suffered a similar fate for claiming that

    the brains of women at the top end are less suited than

    those of men to the study of the hard sciences. In

    America it is widely assumed that socially significant

    differences between ethnic groups and sexes are the

    result of social factors, and in particular of

    discrimination directed against the groups that seem todo less well. This assumption is not the conclusion of a

    reasoned social science but the foundation of an

    optimistic worldview, to disturb which is to threaten the

    whole community that has been built on it. On the other

    hand, as Galileo in comparable circumstances didnt

    quite say, it aint necessarily so.

    ***

    We find ourselves, therefore, in the middle of another

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    tense debate, in which it is not religion, but liberal

    values, which seem to be challenged by the theory of

    evolution. It is against this background that the

    philosopher Jesse Prinz has entered the fray, with a big

    book arguing that there is little reason to think that

    biology has a major impact in accounting for humandifferences. He patiently examines the arguments given

    for attributing this or that trait to genetic inheritance, and

    tries to show either that the research is methodologically

    flawed, or that the conclusion is not supported by it. I say

    patiently, though

    I should also add that, when it comes to discussing IQ

    and

    sexual differentiation, Prinz intemperately dismisses

    those like Charles Murray, Richard Herrnstein and Larry

    Summers who have not been persuaded by the liberal

    consensus.

    Prinz believes that our cognitive powers are awakened

    only when they have experience on which to get to

    work. Infants learn to divide the world into kinds by

    extrapolating from what they feel, hear and see. There

    are no innate classifications, and no roles or

    relationships that are not in some sense and to some

    measure socially constructed. Prinz attacks Chomskys

    claim that there is a universal grammar and dismisses

    the theory held by Jerry Fodor and others that our

    mental processes are conducted in a shared language

    of thought. Silent thinking, for Prinz, involves the use ofimages, which have their source in individual

    experience, while language is picked up by a

    spontaneous statistical analysis from which a child

    derives the rules of grammar. Prinz even goes a little

    way towards resuscitating the notorious Sapir-Whorf

    hypothesis, according to which the structure of a

    persons language determines the contours of his world.

    Language, he writes, is an invention, not an instinct

    If language teaches us about who we are, the lesson is

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    that we are fundamentally flexible. Prinz goes on to

    argue that gender difference is to a great extent

    acquired, that the distinction between individualists and

    collectivists is cultural rather than biological, and that

    emotions are socially constructed from raw material that

    is innate only because it belongs to basic bodilyprocesses and gut reactions.

    All that is argued boldly and with much support from the

    literature of experimental psychology. But I could not

    help feeling that it falls short of its target. In The Blank

    Slate (2002) Steven Pinker assembled the evidence for

    the conclusion that our fundamental capacities are

    implanted by evolution and malleable only in thosematters in which malleability would confer a reproductive

    advantage. His argument was meticulous and serious,

    and the weight of scientific evidence impossible to deny.

    In this or that particular the science might be faulted or

    revised, but the broad case is surely compelling.

    Consider, for example, the division of roles everywhere

    to be observed between men and women. There is a

    powerful reason to think that this is rooted in a deeper

    division of biological labour, selected in the harsh

    conditions that threatened our ancestors with extinction.

    For human beings manifest neoteny, the trait of giving

    birth to helpless large-brained offspring, who can look

    after themselves only after ten years of nurture and

    nowadays not even then. Neoteny is a huge

    evolutionary advantage; but it is purchased at an equallyhuge biological cost. A species whose young are as

    vulnerable as human children needs both organised

    defence and serious home building if it is to reproduce

    itself. And on those granite foundations has been built

    the romantic castle of sexual difference.

    But there is another reason for being dissatisfied with

    Prinzs approach. When the idea of cultural diversity firsttook root in the German Enlightenment it was associated

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    with the study of the myths, customs and artworks of

    antiquity, with the exploration of the religions of the east

    and with visits to the tribal cultures of Africa and

    America. A kind of imperial reverence for those things

    animated the minds of those who studied them, and it

    was with a hint of regret that the early anthropologistsrecorded the rapid collapse of local cultures under the

    withering eye of their researches. Prinz belongs to

    another mindsetone that can be observed in some of

    the disciples of Boas. He does not have much sympathy

    for any culture other than the one in which he is

    immersedthe liberal egalitarian culture of the

    American academy, which holds that sexual roles are

    socially constructed, that sexual morality is exhausted

    by the requirement of consent, and that all

    disadvantage is down to environmental factors which

    we can collaborate to overcome. He would perhaps

    deny that this is a culture, rather than a set of rationally

    held beliefs. But the whole tendency of his argument is

    to suggest that we can and should live in the way that he

    lives, not endowing our differences with the status ofnatural barriers or God-given paths, but opening

    ourselves to a kind of soft diversity, in which human

    possibilities flourish in a condition of mutual acceptance.

    It may be that this is the direction in which we are

    moving. But for all he says to the contrary it could be that

    there are obstacles to progress that are fixed in our

    nature and not to be changed by social adjustment. Weare familiar with the feminist charge that women come

    out worse in maths tests because of unconscious

    discrimination, stereotyping and other factors that

    allegedly sap their confidencean argument that, in the

    eyes of its proponents, was further proved by Larry

    Summerss foolhardy attempt to question it. But does

    anyone believe that men are ten times as likely to end

    up in prison as women because of unconscious

    discrimination or stereotyping? Of course not. We

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    recognise that men are by nature more aggressive and

    more inclined to settle disputes by violence. And no

    educated person is likely to dispute the fact that this

    difference between men and women is genetic. The real

    question is how far does this kind of genetic influence

    extend? Susan Greenfield refers to recent brain-imagingresearch by Ryota Kanai and others at UCL which

    purportedly suggests that students with conservative

    political attitudes tend to have larger than normal

    amygdalae, while among those of liberal persuasion it is

    the anterior cingulate cortex that stands out. Could this

    be the proof of WS Gilberts proposition, that Every child

    who is born alive / Is either a little liberal / Or a little

    conservative?

    Those speculations bring us to another and far more

    serious obstacle to the humane understanding of our

    condition than the one that troubles Prinz. Advances in

    neuroscience are beginning to suggest that, while the

    brain is malleable and adaptable, it comes with its own

    inherent restraints, and with connections that have been

    wired without our knowledge and definitely without our

    consent. Hence processes in the brain can affect our

    decision-making without our being able to counter them.

    When in 1966 Charles Whitman, a man of previously

    good character, killed 13 people and wounded 32 more,

    shooting from the top of the University Tower in Austin

    Texas, he had already indicated that he felt something

    was not quite right in his head. After he was shot by apolice marksman, an autopsy revealed a small tumour

    pressing on the amygdala, which neuroscience regards

    as the seat of the gut reactions through which we protect

    our space. So was Whitman to blame for what he did?

    And if not, does this provide me, after decades of

    reproach for my conservative opinions, with the

    amygdala excuse, just like Whitman?

    Taking off from the Whitman case David Eagleman

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    argues that we should revise our sense of legal and

    moral responsibility, so as to recognise that most of what

    we do and feel arises from processes over which we

    have no control. The brain moves incognito beneath our

    conscious deliberations, like a great ocean liner on the

    deck of which we walk up and down, imagining that wemove it with our feet. Offering his own version of the

    Freudian story, in the luminous prose for which he is

    rightly esteemed, Eagleman argues that most of what we

    do is more influenced by unconscious than by

    conscious processes, and that concepts like

    responsibility and freedom cannot survive intact from the

    advances of neuroscience. Whether it is nature or

    nurture that wired up the brain, the wiring is for the most

    part none of our doing, and nothing for which we can be

    praised or blamed.

    Eagleman is too subtle a thinker, and too responsible a

    person, to draw quite that conclusion. He wants to revise

    our concept of responsibility so that his kind of

    responsibility is still contained in it. My brief response,

    however, is to suggest that he has misdescribed the

    problem. The picture that he gives, of the fragile I riding

    the elephant of grey matter while pretending to be in

    charge of it, misrepresents the nature of self-reference.

    The word I does not refer to some conscious part of

    the person, the rest of which is a passive and hidden it.

    The I is one term of the I-You relation, which is a

    relation of accountability in which the whole person isinvolved. To use the first-person pronoun is to present

    myself for judgement. It is to take responsibility for a host

    of changes in the world, and in particular for those for

    which you can reasonably call me to account by asking

    why? This question is the foundation of a co-operative

    enterprise, in which we elicit from each other the

    reasons, meanings and choices that make us intelligible.

    Understanding the logic of the question why? is a task

    that has been addressed by several recent philosophers

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    Elizabeth Anscombe, Stephen Darwall, Sebastian

    Rdl and others. It is the question that underlies the

    concept of responsibility in the common law. And

    philosophers have done much to show that the dialogue

    through which we establish and broker our

    responsibilities is well founded and not necessarilyvulnerable to disruption by our newfound knowledge of

    the brain.

    This point suggests how Prinz might have put

    philosophy to work on behalf of his conclusions. The

    real question raised by evolutionary biology and

    neuroscience is not whether those sciences can be

    refuted, but whether we can acceptwhat they have tosay, while still holding on to the beliefs that morality

    demands of us. From Kant and Hegel to Wittgenstein

    and Husserl there have been attempts to give a

    philosophyof the human condition that stands apart

    from biological science without opposing it. But those

    attempts are either not noticed or given short shrift in

    Prinzs argument which, by attempting to fight the

    biological sciences on their own ground, is condemned

    to a losing wicket.

    We are human beings, certainly. But we are also

    persons. Human beings form a biological kind, and it is

    for science to describe that kind. Probably it will do so in

    the way that the evolutionary psychologists propose. But

    persons do not form a biological kind, or any other sort

    of natural kind. The concept of the person is shaped in

    another way, not by our attempt to explain things but by

    our attempt to understand, to interact, to hold to account,

    to relate. The why? of personal understanding is not

    the why? of scientific inference. And it is answered by

    conceptualising the world under the aspect of freedom

    and choice. People do what they do because of events

    in their brains. But when the brain is normal they also actfor reasons, knowing what they are doing, and making

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    themselves answerable for it.

    This does not mean that we should ignore what goes on

    in the brain. In her lively monograph Susan Greenfield

    emphasises that our brains are plastic and can be

    influenced in ways that pose a risk to our moral

    development. Prinzs defence of nurture against nature

    may look like a defence of human freedom. But nurture

    can as easily destroy freedom as enhance it. We can

    bring up children on passive and addictive

    entertainments that stultify their engagement with the

    real world and rewire the neural networks on which their

    moral development depends. The short-term pursuit of

    gratification can drive out the long-term sense ofresponsible agency. Moreover, if children learn to store

    their memory in computers and their social life in

    portable gadgets, then gradually both memory and

    friendship will wither, to linger on only as futile ghosts

    haunting the digital archives.

    I sympathise with those worries. But it does not change

    the position that a philosopher should adopt.Greenfields argument suggests that there is a kind of

    human development that prepares us, at the

    neurological level, for the exercise of responsible

    choice. If we bring up our children correctly, not spoiling

    them or rewiring their brains through roomfuls of digital

    gadgetry, the sense of responsibility will emerge. They

    will enter fully into the world of I and You, become free

    agents and moral beings, and learn to live as they

    should, not as animals, but as persons.

    Allow children to interact with real people, therefore, and

    the grammar of first-person accountability will emerge of

    its own accord. Undeniably, once it is there, the I-to-you

    relation adds a reproductive advantage, just as do

    mathematical competence, scientific knowledge and

    (perhaps) musical talent. But the theory of adaptation

    tells us as little about the meaning of I as it tells us

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    about the validity of mathematics, the nature of scientific

    method or the value of music. To describe human traits

    as adaptations is not to say how we understand them.

    Even if we accept the claims of evolutionary psychology,

    therefore, the mystery of the human condition remains.

    This mystery is captured in a single question: how canone and the same thing be explainedas an animal, and

    understoodas a person?

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    Section: FEATURES

    Subject:

    Tags:AESTHETIC INTERESTS,ALDWORTH,ASPECTS OF

    CULTURE, BIOLOGICAL PHENOMENON, CANONGATE,

    CULTURAL DIVERSITY, CULTURE RELIGION, DAVID EAGLEMAN,

    DURKHEIM, FRANZ BOAS, GENDER ROLES, HIERARCHIES,

    HUMAN NATURE, HUMAN TRAIT, INCEST TABOOS, JESSE PRINZ,

    JOHN TOOBY, LEDA COSMIDES, LIBERAL VALUES, MORALITY

    AND LAW, NATURE NURTURE, NATURE NURTURE DEBATE,

    RITES OF PASSAGE, SEXUAL DOMINANCE, SOCIAL SCIENTISTS,

    SUSAN GREENFIELD, TRANSITION 5