The Nurture Assumption: Why Children Turn Out the Way They Do
By Judith Rich Harris and Steven Pinker
4.5/5
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About this ebook
How much credit do parents deserve when their children turn out welt? How much blame when they turn out badly? Judith Rich Harris has a message that will change parents' lives: The "nurture assumption" -- the belief that what makes children turn out the way they do, aside from their genes, is the way their parents bring them up -- is nothing more than a cultural myth. This electrifying book explodes some of our unquestioned beliefs about children and parents and gives us a radically new view of childhood.
Harris looks with a fresh eye at the real lives of real children to show that it is what they experience outside the home, in the company of their peers, that matters most, Parents don't socialize children; children socialize children. With eloquence and humor, Judith Harris explains why parents have little power to determine the sort of people their children will become.
The Nurture Assumption is an important and entertaining work that brings together insights from psychology, sociology, anthropology, primatology, and evolutionary biology to offer a startling new view of who we are and how we got that way.
Judith Rich Harris
Judith Rich Harris is the author of No Two Alike: Human Nature and Human Individuality . A former writer of college textbooks, Harris is a recipient of a George A. Miller award, given to the author of an outstanding article in psychology. She is an independent investigator and theoretician whose interests include evolutionary psychology, social psychology, developmental psychology, and behavioral genetics.
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Reviews for The Nurture Assumption
12 ratings3 reviews
- Rating: 3 out of 5 stars3/5The author's essential points are two-fold. (1) Parenting has extremely little effect on how children turn out and (2) What does have some effect is the group of peers with which the child associates.Unfortunately the book is not what it could be in proving these assertions. WRT the writing, the author repeats herself constantly. The book reads like something targetted at the idiot market (eg diet books, astrology) rather than a popular science work with some faith in its readers. Even more problematic is that the author constantly assumes that the way children were reared in pre-civilized society is the way they should be reared today which strikes me as a bizarre claim. The fact that children reared that way turned out fit for life as hunter-gatherers says nothing about whether they'll reach their full potential in modern society. The work is certainly interesting when it criticizes existing practices, but I wouldn't take too seriously any of its claims without independent confirmation.
3 people found this helpful
- Rating: 4 out of 5 stars4/5A very good book - a thought-provoking one. The author proves - in a very consistent and systematic way - that there's no point in trying to "teach children to behave". She shows that there's no connection, no correlation whatsoever between how children are forced or encouraged to behave in the family and how they behave later in life.A must-read book for parents, as well as prospective parents.There are some flaws in the logic of course, and a counter-book can easily be written, but as the major assumption around, and the default attitude towards children seem to be that of a "Do behave!" kind, I guess this book is much more important than the imaginary "opposite one". Parents deserve to be somewhat relieved. We deserve to know that as long as we behave with our children in some more-or-less normal way, we have almost no chance to screw up. The "parenting style" is completely irrelevant! I do really like that =)
1 person found this helpful
- Rating: 5 out of 5 stars5/5This book is likely to have a big impact on child rearing practices. It suggests that instead of trying to turn your child into an Einstein or Mozart, you should relax and enjoy him. The largest effect you can have is to select your child's peer group.
1 person found this helpful
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The Nurture Assumption - Judith Rich Harris
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Critical Praise for The Nurture Assumption
"Judith Rich Harris wrote a brilliant book called The Nurture Assumption. . . . Beautifully and convincingly, Harris showed that our parents play a far smaller role in determining how we are than we could ever imagine—and that what really matters is the influence of our peers. At a time when parents have become convinced that everything they say and do irreparably affects the lives and potential of their children, Harris’s book is an absolute must-read."
—Malcolm Gladwell, Entertainment Weekly
Important. . . . Lively anecdotes about real children suffuse this book. . . . Harris’s brilliant stroke was to change the discussion from nature (genes) and nurture (parents) to its older version: heredity and environment.
—Carol Tavris, The New York Times
A sea-changing book.
—Ellen Goodman, The Boston Globe
Harris’s book is well written, toughly argued, filled with telling anecdotes and biting wit.
—Howard Gardner, The New York Review of Books
Harris’s core, convincing message—that many parents wildly overestimate their influence—may usefully calm some nerves in this age of high-anxiety parenting.
—Robert Wright, Time
A leading tome on child development published in 1934 didn’t even include a chapter on parents . . . With an impish wit and a chatty style, Harris spins a persuasive argument that the 1934 book got it right.
—Sharon Begley, Newsweek
Mixing logic-chopping rigor and wise-cracking humor, Harris turns academic overviews and her own sleuthing into a brisk tour of controversial data collection and interpretation. She deftly leads her readers through the inadequacies of socialization research.
—Ann Hulbert, The New Republic
Her conclusions have rocked the world of child development
—Susan Reimer, The Baltimore Sun
Ms. Harris takes to bits the assumption which has dominated developmental psychology for almost half a century. . . . Her book is an extraordinary feat.... She writes with unusual clarity and irreverent wit.
—The Economist
Occasionally, The Great American Hype Machine trumpets a book well worth reading. . . . I’m pleased to welcome Mrs. Harris and her impressive rationality, serious scholarship, sardonic humor, and vivid prose to the ranks of realists.
—Steve Sailer, The National Review
Harris... has razor-sharp common sense, perhaps the greatest gift of all.
—Wendy Orent, The Atlanta Journal and Constitution
Shockingly persuasive. . . . Harris has an impressive breadth of knowledge, and entertainingly leads the reader from social development to genetics, from neuropsychology to criminology, and from social anthropology to linguistics and child-care.
—Simon Baron-Cohen, Nature
"Harris is a wonderful writer who doesn’t stop drawing research from fields as disparate as behavioral psychology, ethnology, evolution, and sociology; she also draws cultural allusion from sources as disparate as Little House on the Prairie, Darwin, and Dave Barry."
—Marjorie Williams, The Washington Monthly
[Harris] is eloquent and entertaining, she makes people sit up and pay attention, and she opens our eyes to important considerations.
—Sir Michael Rutter, The London Times Higher Education Supplement
A cool compress for feverish parents who fear their every action . . . will mark their child’s psyche for life.
—Lynn Smith, Los Angeles Times
[Harris] presents her arguments in a style that is engaging and fun to read. People who raise children, teach children, and treat children will want to read this book.
—Dr. William Bernet, Journal of the American Medical Association
"Judith Rich Harris is a fiery iconoclast who offers relief. If you accept the central thesis of The Nurture Assumption, you can at last relax about raising your children. . . . Her book is worth reading if only for the pleasure of watching an acknowledged outsider taking on the conventional wisdom with such chutzpah."
—Jack O’Sullivan, The Independent
The maverick writer and theoretician believes that peers, not parents, determine our personalities, and her unorthodox views have made the very real world of psychology sit up and take notice.
—Annie Murphy Paul, Psychology Today
"The Nurture Assumption is a hoot. [Harris] is a witty and articulate writer who clearly and systematically explains her refutations of commonly held assumptions in social psychology and behavioral genetics. . . . It’s a very readable... entertaining book."
—Dr. Marilyn Heins, The Arizona Daily Star
"An iconoclastic contribution to conventional psychology, The Nurture Assumption may also be a window on the future, triggering a shift away from a century of thinking that elevates early parental influence over all else."
—Cate Terwilliger, The Denver Post
What Harris proposes is nothing short of breathtaking . . . her ideas might easily be dismissed, but Harris has done some serious research in psychology, sociology, and anthropology, backing her theory with dozens of articles and studies. . . . She also has the wit to write about them in a breezy and often entertaining manner.
—Peter Jensen, The Baltimore Sun
An extraordinarily ambitious attempt to reexamine, from the ground up, an entire century’s worth of findings on the forces that mold the child of today into the adult of tomorrow.... Most of what Harris writes is not only illuminating, but thoroughly persuasive.
—Mary Eberstadt, Commentary
Her ideas make fascinating reading, and her work clearly deserves attention from developmental psychologists and other scholars of child development.
—Wendy M. Williams, The Chronicle of Higher Education
"The Nurture Assumption is a stunning book . . . Judith Harris shows how in thinking about child development we are trapped in a maze created by our uncritical acceptance of entrenched beliefs and biases.... The result is a new perspective that provides a thread we can follow to escape the maze."
—John T. Bruer, president of the James S. McDonnell Foundation; author of The Myth of the First Three Years
"Judith Harris’s The Nurture Assumption is a paradigm shifter, which sounds like heavy work and yet she somehow makes it fun."
—David T. Lykken, professor of psychology, University of Minnesota; author of The Antisocial Personalities and Happiness: What Studies of Twins Show Us About Nature, Nurture, and the Happiness Set Point
"The Nurture Assumption is a rare book: clear, well informed, occasionally hilarious, and rich with compelling examples."
—David G. Myers, professor of psychology, Hope College; author of The Pursuit of Happiness: Who is Happy—and Why and Intuition: Its Powers and Perils
The book is based on solid science, analyzed with a piercing style that’s not afraid to take on the leading orthodoxy, and communicated in a clear, accessible, terrifically witty way.
—Robert M. Sapolsky, professor of neuroscience and biology, Stanford University; author of The Trouble with Testosterone and Why Zebras Don’t Get Ulcers
Truly revolutionary ideas turn topsy-turvy our most cherished ways of viewing the world and ourselves.... This is essential reading if you want to know how you became who you are—and what your children will grow up to be.
—Dean Keith Simonton, professor of psychology, University of California at Davis; author of Scientific Genius and Greatness: Who Makes History and Why
Also by Judith Rich Harris
No Two Alike: Human Nature and Human Individuality
FREE PRESS
A Division of Simon & Schuster, Inc.
1230 Avenue of the Americas
New York, NY 10020
www.SimonandSchuster.com
Copyright © 1998, 2009 by Judith Rich Harris
All rights reserved, including the right to reproduce this book or portions thereof
in any form whatsoever. For information address Free Press Subsidiary Rights Department,
1230 Avenue of the Americas, New York, NY 10020
This Free Press trade paperback edition February 2009
FREE PRESS and colophon are trademarks of Simon & Schuster, Inc.
Manufactured in the United States of America
10 9 8 7 6 5 4 3 2 1
Library of Congress Cataloging-in-Publication Data
Harris, Judith Rich
The nurture assumption : why children turn out the way they do, by Judith Rich Harris, 2d ed., revised and updated
p. cm.
Includes bibliographical references and index.
1. Child development—United States. 2. Child rearing—United States. 4. Children and the environment—United States.
HQ772. H353 2009
305.231 22—dc
200803207979
ISBN-13: 978-1-4391-0165-0
ISBN-10: 978-1-4391-0165-5
eISBN 13: 978-1-4391-3508-2
For Charlie, Nomi, and Elaine
Your children are not your children.
They are the sons and daughters of Life’s longing for itself.
They come through you but not from you,
And though they are with you yet they belong not to you.
You may give them your love but not your thoughts,
For they have their own thoughts.
You may house their bodies but not their souls,
For their souls dwell in the house of tomorrow, which you cannot visit, not even in your dreams.
You may strive to be like them, but seek not to make them like you.
For life goes not backward nor tarries with yesterday.
—Kahlil Gibran
CONTENTS
Introduction to the Second Edition
Foreword to the First Edition by Steven Pinker
Preface to the First Edition
Chapter 1: Nurture
Is Not the Same as Environment
Chapter 2: The Nature (and Nurture) of the Evidence
Chapter 3: Nature, Nurture, and None of the Above
Chapter 4: Separate Worlds
Chapter 5: Other Times, Other Places
Chapter 6: Human Nature
Chapter 7: Us and Them
Chapter 8: In the Company of Children
Chapter 9: The Transmission of Culture
Chapter 10: Gender Rules
Chapter 11: Schools of Children
Chapter 12: Growing Up
Chapter 13: Dysfunctional Families and Problem Kids
Chapter 14: What Parents Can Do
Chapter 15: The Nurture Assumption on Trial
Appendix 1. Personality and Birth Order
Appendix 2. Testing Theories of Child Development
Notes
References
Acknowledgments
Index
About the Author
INTRODUCTION TO THE SECOND EDITION
They called me the grandmother from New Jersey
and they said I had a hell of a nerve. I do, in fact, live in New Jersey, and ten years ago, when the first edition of The Nurture Assumption was published, I was sixty years old. And I did indeed have a grandchild, though she was still quite small. Now she’s on the brink of adolescence and my youngest grandchild—I now have four—is in nursery school.
As for the hell of a nerve, sorry, that hasn’t changed. This is the second edition of The Nurture Assumption, but its message remains the same. The experts
are wrong: parental nurturing is not what determines how a child turns out. Children are not socialized by their parents. The nurture assumption is a myth and most of the research used to support it is worthless. Diplomacy has never been my strong suit.
In spite of its uncompromising message, and the tumultuous criticism that greeted its first appearance, the book has been called back for an encore. I suspect the reaction to its second appearance will be far less tumultuous. To some extent at least, times have changed.
But I’m getting ahead of myself. My first job is to introduce you to the revised edition of The Nurture Assumption. As you’ve already noticed, I’ve provided it with a new introduction. Appendix 2, Testing Theories of Child Development,
is also entirely new. Among other things, Appendix 2 describes some research—so fresh that, as I write these words, some of the studies have not yet been published—designed to test my theory. Designed, interestingly enough, not by developmentalists but by criminologists.
The most conspicuous change you’ll find in this edition is the addition of endnote numbers: little superscripts like this,¹ sprinkled here and there throughout the text. The numbers take you to correspondingly numbered endnotes in a section at the back of the book, right after Appendix 2. The first edition had no little superscripts, though there were plenty of endnotes at the back. They were labeled with a page number and a phrase—a few words that linked them to a particular spot on the specified page. I thought it was an elegant system because it left the text uncluttered.
Unfortunately, there were problems with that system. People could read a paragraph and not know whether I had provided a reference in an endnote or was simply talking through my hat. Worse still, some readers never discovered the endnotes at all. Some of these unobservant people complained, loudly and publicly, about their absence.
The endnotes are even more important in this edition, because that is where you will find much of the new material. For example, I made a prediction in Chapter 12 about the kinds of anti-smoking ads that would or would not be successful in lowering the chances that a teenager will smoke. The end-note contains an update on that prediction: two studies, done after the publication of the first edition, that assessed the effectiveness of two different anti-smoking ad campaigns. Not to keep you in suspense, one series of ads was effective, the other was not. Would you care to guess which one was sponsored by the tobacco industry?
Aside from the citations of specific articles and books (which are listed alphabetically in References), the endnotes also contain other information—details or things of interest that didn’t fit into the text. Before you start reading a chapter, it might be a good idea to glance through its endnotes, to get a quick preview of what they have to offer.
For those who are fond of statistics, the total number of endnotes in this edition is 805 (versus 717 in the first edition). The reference list now contains 770 items (versus 691 in the first edition). A few references have been deleted; many new ones have been added.
The text itself has undergone many small changes and a few medium-sized ones. I’ve corrected minor errors and touched up passages that were confusing or hard to read. More important, I’ve rewritten some sections in order to take account of what has subsequently been learned about the topic under discussion. But neither in the text nor in the endnotes have I attempted to take account of everything that’s happened, and everything I’ve learned, since the first edition was published. To do that would mean writing a whole new book.
As it happens, I’ve done that. Its title is No Two Alike: Human Nature and Human Individuality. It contains, in addition to an update of the research, an update of the theory. Not a major renovation—that wasn’t necessary. The new version of the theory is basically an elaboration of the one presented in the book you currently have in your hand. More bells and whistles, as computer people say. The original version of the theory does a good job of explaining socialization but is a bit vague in accounting for individual differences in personality, noticeable even in identical twins raised in the same home. No Two Alike focuses on these personality differences, whereas The Nurture Assumption is mainly about socialization.
It is now clear to me that socialization and personality development are two distinct processes. Socialization adapts children to their culture, with the result that they become more similar in behavior to their peers of the same sex. Personality development has the opposite effect: it preserves or widens individual differences. It was an error on my part to conflate these two processes. The fact that they have been conflated by every psychologist since Freud is no excuse. As demonstrated by the story (told here in Chapter 1) of the behaviorists’ rejection of Freudian psychology, the rejection of assumptions almost never goes far enough.
No one, however, accused me of not going far enough when the first edition of this book appeared ten years ago. On the contrary, I was depicted as a wild-eyed radical. An extremist. People might have accepted with a yawn the idea that parents’ influence on their children had been somewhat overestimated, but what I was proposing was far more heretical: that parents have no lasting influence on their children’s personalities or on the way they behave outside the home. This proposition doesn’t mean that parents are unimportant—they have other roles to play in their children’s lives. But the subtleties were lost when the media compressed my argument into three little words. Do Parents Matter?
asked the cover of Newsweek. Do Parents Matter?
asked Malcolm Gladwell in The New Yorker. Parents were understandably offended by the question. Opinion pieces appeared in almost every newspaper and magazine on the continent. Even Rural Heritage, a publication that describes itself as a bimonthly journal in support of farming with horses, mules and oxen,
expressed an opinion.²
In Chapter 19 of his book The Blank Slate, Steven Pinker described some of the things that happened after The Nurture Assumption, as he put it, hit the fan.
³ Somehow I had managed to incur the wrath of both liberals and conservatives. Critics with Ph.D. s pointed out that I didn’t have a Ph.D. and therefore didn’t know what I was talking about. Developmental psychologists lined up to tell journalists about all the evidence I had supposedly ignored. Some people accused me of giving parents permission to abuse or neglect their children—untrue!—or of claiming that children don’t need parents—also untrue.
But good things happened, too. I had spent the previous twenty years working quietly at home, seldom seeing anyone outside my family. Suddenly everyone wanted to talk to me. Journalists and television crews beat a path to my door. When the foreign editions of the book started to appear—there are fifteen translations—journalists from abroad came to call. And letters arrived, via e-mail and post, from people in all walks of life and from many different countries. A few of them were nasty but the overwhelming majority were nice.
The Nurture Assumption even inspired a cartoon by the famous (now retired) cartoonist Jules Feiffer. The six panels show a man lying on a psychoanalyst’s couch. He’s saying, "All my life I’ve blamed my mother when I couldn’t hold a girl, or keep a job. . . . But then this new book comes out—With scientific proof that our parents don’t have much effect on how we turn out. It’s our peers! . . . It wasn’t my mother who ruined my life. It was Freddy Abramowitz."
No, it wasn’t Freddy Abramowitz. But Feiffer was not the only one to make that mistake. Let me take this opportunity to clear up some misunderstandings about the role of peers in how we turn out.
First, though it’s true that you can’t blame your hangups on your relationship with your mother, you can’t blame them on your relationship with Freddy Abramowitz, either. Relationships do matter—they generate powerful emotions and take up a large portion of our thoughts and memories—but nevertheless they don’t have much effect on how we turn out. My theory doesn’t attribute socialization to relationships with peers or even to interactions with peers.
My use of the term peer group
also led to some confusion. The term makes you think of a group of teenagers who hang around together. Indeed, a group of teenagers who hang around together is a peer group. But in this book the term is used in a much broader way. As explained in Chapter 7, what I really mean by group
is social category.
A social category—for example, girl—may be an actual group of people, but it doesn’t have to be. By identifying with the social category girl, a young human is socialized as a female child. She learns how children are expected to behave (not exactly like grownups). She learns how girls are expected to behave (not exactly like boys). She can identify with the social category girl even if she has never seen more than two or three other girls together in one place. She can categorize herself as a girl even if the other girls don’t like her and don’t want to play with her. Even if she doesn’t like them.
The confusion about peer groups led to other misunderstandings. The theory proposed in this book, group socialization theory,⁴ isn’t mainly about teenagers. It isn’t about something that happens to older children but not to younger ones, or that happens more and more as children get older. I’m talking about something that begins as soon as children go out of the house and find themselves in a place where there are other children. It can begin as early as age two and certainly, for most children, by age three.
Nor does the theory describe something that has recently gone wrong in our society, due to some imagined shortcoming of parents. Though the culture has indeed changed, the children of today are not more influenced by their peers than were the children of yesterday. Group socialization theory has to do with the way a child’s mind works. Children’s minds work no differently today than they did in earlier times.
Thus, what I say in this book doesn’t apply only to children in complex, urbanized societies like our own. Anthropologists, ethologists, and historians have found that styles of parenting differ dramatically from one society to another and from one historical period to another. And yet, despite these differences, children are the same the world around. In every society, children show a strong desire to get together with other children. And what they do when they get together is basically the same, all over the world and all through history.⁵
Another misconception is that my rejection of the nurture assumption was based mainly on evidence from twin studies. That evidence is important but it doesn’t stand alone. It is important because it dovetails with many other perplexing findings that keep turning up. The fact that only children don’t differ in any important way from children with siblings, for example. Or that young children who go to day-care centers don’t differ in any important way from those cared for at home by their parents. Or that those who have two parents of the same sex don’t differ in any important way from those who have one of each sex. And so on. You’ll find lots of other observations in this book that don’t fit into the standard view of child development. These observations, stored in a corner of my mind, laid the groundwork for the epiphany described in Chapter 12. As one astute reader noted, Trying to squeeze existing facts into an outdated theory is like trying to fit a double-sized sheet onto a queen-sized bed. One corner fits, but another pops out.
⁶ Eventually one gets tired of the popping and throws out the old sheet.
Despite that housewifely metaphor, it wasn’t my experiences as a full-time mother that caused me to throw out the nurture assumption. It was evidence (see the endnotes). During the time I was personally experiencing motherhood, my beliefs about child development were entirely conventional. By the time I started questioning those beliefs, my children were grownups, embarked on successful adult lives. Too bad I can’t take credit for the way they’ve turned out.
But the fact that my theory is supported by evidence doesn’t mean it has been proved. The character in the Jules Feiffer cartoon said the book contains scientific proof that our parents don’t have much effect on how we turn out.
Scientifically speaking, a statement like don’t have much effect
cannot be proved, because it’s impossible to prove a negative—what statisticians call a null hypothesis.
Rather than trying to prove the null hypothesis, I’m defending it. I’m taking the position that the way parents rear their children has no important effects on the way the children turn out. Now it’s up to the people who believe in the nurture assumption to find evidence that would enable them to reject that null hypothesis. They need convincing evidence—evidence that holds up to close scrutiny.
They still haven’t found it, though decades of work have been devoted to the effort. At least, they hadn’t found it as of 2005. That was when an unusually candid developmental psychologist publicly admitted, in an essay in the online magazine Edge, that psychologists have not yet proven to skeptics that parents have a strong influence.
⁷ The developmentalist, Ellen Winner of Boston College, was one of a group of scientists and technologists who replied to the question What do you believe is true even though you cannot prove it?
Winner said she believes that parents do shape their children.
She still believes in the nurture assumption, even though she cannot prove it. She hasn’t given up hope, however, that someday proof will be found, and that Judith Rich Harris will be consigned to her proper place in the halls of infamy.
Other professors of psychology, less knowledgeable or less forthright, have been claiming ever since 1998 that they already had the proof.⁸ I’ve spent a lot of time investigating those claims. Some of my findings were unsurprising—flaws in methodology and so forth—but some were deeply unsettling, even for a jaded old bird like me. You’ll find that story in Chapters 3 and 4 of No Two Alike.
Near the beginning of this introduction I said, with uncharacteristic cautiousness, To some extent at least, times have changed.
That statement requires an explanation. To what extent, and in what way, have times changed?
For one thing, there is now more acceptance of the idea that behavior is influenced by genes and that individual differences in behavior are due in part to differences in genes. People are more willing to admit that children can inherit behavioral quirks and personality characteristics from their parents, along with the color of their hair and the shape of their nose. This has been a cultural shift—a gradual one—and I had nothing to do with it, of course. Nevertheless, it may have made people a little more receptive to my message. The point is that most of the observations that until recently had been attributed to parental influence are actually due (as explained in Chapters 2 and 3) to the genetic similarity of parents and children. So it is a mark of progress that statements such as I got that from my mother
are now heard as ambiguous: Are you talking about heredity or do you mean you learned it from your mother? Ten years ago, it almost always meant learned it from my mother.
Was it this cultural shift that led to greater acceptance of my theory? Or was it the fact that new findings, consistent with the theory, kept turning up? Over time, the early, angry response to The Nurture Assumption has softened noticeably, both within and outside of academia. Today, the book is widely cited in textbooks and journal articles.⁹ It’s assigned and discussed in courses in many colleges and universities; it shows up on exams.
On the other hand, many of these citations and discussions are unfavorable. Often I am used as a straw man that students are invited to overturn. The favorable mentions are more likely to come from fields other than developmental psychology—criminology, for example. Though a few developmentalists have been won over, most have not. As a result, many of them are still doing the same kind of research¹⁰ that is dissected so mercilessly in this book. The kind I called, at the beginning of this introduction, worthless. It is worthless because the methods used by these researchers give them no way to distinguish between the influence of the child’s environment and the influence of the child’s genes. My primary interest is environment, not genes. But we cannot tell what the environment does to a child unless we know what the child brings to that environment.
In his foreword to the first edition of The Nurture Assumption (you’ll find it right after this introduction), Steven Pinker made a rash prediction about the book: I predict it will come to be seen as a turning point in the history of psychology.
Perhaps it is too soon to judge whether psychology has rounded a bend; perhaps it will take the perspective of twenty or thirty years. Even at this point, though, there are signs of a slight shift in direction. Within developmental psychology, I’ve noticed that descriptions of procedures and results are beginning to sound a bit defensive. Greater progress has been made in other areas of psychology. And the e-mail I receive from students gives me high hopes for the younger generation coming up.
There are fewer signs of progress outside academia. People’s increased understanding of genetics hasn’t caused them to lose their faith in the nurture assumption. A recent issue of Time, for example, featured several articles on obesity in children. Though genes and culture are acknowledged to play a role, the onus is still on parents. How can parents teach their children to be in control of their own eating habits?
one article asks. Why is it so important for parents to set a good dietary example for their kids?
¹¹ The trouble is that there’s no evidence that what parents teach their kids about eating, or the example they set, has any long-term effects on the kids. As explained in Chapter 13, adult adoptees show no signs of having been influenced in their eating habits by the adoptive parents who reared them. Body weight isn’t entirely genetic, but the part that is not genetic cannot be blamed on the home or the parents.¹²
One of my hopes was that I could make child-rearing a little easier, a little less stressful for parents. Alas, it has not happened, as far as I can tell. Parents are still using the anxiety-ridden, labor-intensive style of parenting prescribed by their culture; they’ve paid no attention to my well-meaning advice to lighten up. Even my own daughters are rearing their children that way.
But why should I expect to have an influence on my own daughters?
Judith Rich Harris
Middletown, New Jersey
June 2008
FOREWORD TO THE FIRST EDITION
Three years ago an article in the Psychological Review forever changed the way I think about childhood and children. Like most psychologists, I have argued a lot about the relative roles of genetic endowment and parental upbringing. We all take it for granted that what doesn’t come from the genes must come from the parents. But here was an article by someone named Judith Rich Harris, with no university affiliation under her name, saying that children aren’t socialized by their parents—they’re socialized by their peers. It sounded weird, but Harris soon persuaded me with facts that I knew to be true but had filed away in that mental folder we all keep for undeniable truths that do not fit into our belief systems.
I study language development: how children acquire a grammatical rule system from the parental input, as we say in the business. A strange factoid in our True-But-Inconvenient file is that children always end up with the language and accent of their peers, not of their parents. No one in psycholinguistics had ever called attention to this fact, let alone explained it. But here was a theory that did.
Other facts about language fit Harris’s theory, too. Children learn a language even in the many cultures in which adults don’t speak to them; they do just fine listening to their slightly older peers. Children who are not exposed to a full-blown grammatical language from adults can create one among themselves. And children of immigrants pick up language from the playground so well that they are soon ridiculing their parents’ grammatical errors.
Acquiring the particulars of a native language is an example of cultural learning. Children in Japan speak Japanese, children in Italy speak Italian, and these differences have nothing to do with their genes. If these differences also have nothing to do with what they learn from their parents, then maybe, Harris pointed out, we need to rethink cultural learning in general. It had always seemed obvious to me that children are socialized by their parents. But among the items stashed away in my True-But-Ignored file was the fact that many successful people—my own father among them—were children of immigrants who were not handicapped in the least by culturally inept parents who never acquired the language, customs, or know-how of their adopted land.
Harris’s article had more than just a neat idea and some everyday truths. She backed up her theory with technical literature from psychology, anthropology, cultural history, behavioral genetics, and primatology, and she used it to shed light on a variety of topics such as sex-role development and adolescent delinquency. In my first e-mail to her I asked, Have you thought of writing a book?
The thesis of The Nurture Assumption—that in the formation of an adult, genes matter and peers matter, but parents don’t matter—raises issues about children and parents that could not be more profound. It calls into question the standard social science model of the child as a bundle of reflexes and a blank cortex waiting to be programmed by benevolent parents—which, when you think about it, is pretty improbable on biological grounds. Like other living things, children are products of evolution and must be active players in their own struggle to survive and eventually to reproduce. This has important implications, thoroughly explored herein.
For one thing, the biological interests of the parent and the child are not identical. So even if children acquiesce to their parents’ rewards, punishments, examples, and naggings for the time being—because they are smaller and have no choice—they should not allow their personalities to be permanently shaped by these tactics.
Moreover, Homo sapiens is a species that lives in groups, and a group is like any other aspect of an organism’s environmental niche: it has a texture of causes and effects that the organism had better adapt to. Prospering in a group means taking advantage of the fact that many heads are better than one and sharing in its accumulated discoveries. It means figuring out local norms that may seem utterly arbitrary but that are adaptive because they are shared (familiar examples include paper currency and driving on the right side of the road). It means striving to benefit from one’s association with other people, rather than allowing oneself to be exploited or dominated. And since each group develops a commonality of interests that puts it into conflict with other groups, it means taking part in group-against-group competitions.
Today, children win or lose by their ability to prosper in this milieu; in the past they lived or died by it. It makes sense that they should take their calories and protection from their parents, because their parents are the only ones willing to provide them, but that they should get their information from the best sources they can find, which might not be their parents. The child will have to compete for mates, and before that for the status necessary to find and keep them, in groups other than the family—groups that play by different rules. Children and parents may even find themselves in partly competing groups. Nature surely did not design children to be putty in their parents’ hands.
Equally unlikely is the idea that a baby’s attachment to its mother sets the pattern for its later commerce with the world—another dogma dissolved in these pages. Relationships with parents, with siblings, with peers, and with strangers could not be more different, and the trillion-synapse human brain is hardly short of the computational power it would take to keep each one in a separate mental account. The attachment hypothesis owes its popularity to a tired notion bequeathed to us by Freud and the behaviorists: the baby’s mind as a small blank slate that will retain forever the first few inscriptions written on it.
The Nurture Assumption is truly rare. Though its thesis is at first counterintuitive, one gets a sense of real children and parents walking through these pages, not compliant little humanoids that no one actually meets in real life. Among its other treats are a devastating methodological critique of much research in child development, an eye-opening analysis of why schools fail, an explanation of why female doctors and lawyers have children who insist that women are supposed to be housewives, and an uncommonly wise answer to the inevitable question: So you’re saying it doesn’t matter how I treat my child?
Being among the first to read this electrifying book has been one of the high points of my career as a psychologist. One seldom sees a work that is at once scholarly, revolutionary, insightful, and wonderfully clear and witty. But don’t be misled by all the fun. The Nurture Assumption is a work of serious, original science. I predict it will come to be seen as a turning point in the history of psychology.
Steven Pinker
Cambridge, Massachusetts
May 1998
PREFACE TO THE FIRST EDITION
This book has two purposes: first, to dissuade you of the notion that a child’s personality—what used to be called character
—is shaped or modified by the child’s parents; and second, to give you an alternative view of how the child’s personality is shaped. My arguments against the old notion and in favor of the new one were originally sketched out in a 1995 article I wrote for the journal Psychological Review. The article began with these words:
Do parents have any important long-term effects on the development of their child’s personality? This article examines the evidence and concludes that the answer is no.¹
It was a challenge—a slap in the face, really—to traditional psychology. I expected people to be taken aback, maybe even angry. But what many readers focused on instead was the strange lack of a university affiliation—of any affiliation—under the author’s name; the puzzling absence, in the acknowledgments footnote, of thanks to granting agencies for supporting my research. I was not a professor, not even a graduate student. Hardly anyone had ever heard of me, and here I was publishing an article in psychology’s most distinguished academic journal—a journal that accepts maybe 15 percent of the manuscripts submitted to it.
I meant my readers to get mad but instead they got curious. They sent me e-mail. Members of the academic world wrote to me, inquiring politely (or not so politely) who I was and who were my mentors. My who-the-hell-areyou? mail, I call it. Here is my favorite example of the genre, from a professor at Cornell University:
Your article constitutes a major contribution to personality and developmental psychology—which only makes me even more curious about you. Are you an academic? A clinician? An unemployed steel worker who has an interesting hobby of writing seminal scientific articles?
Of those choices, I told him, I’d have to pick (c): an unemployed steel worker. In fact, I said, I was an unemployed writer of college textbooks. I explained that I had no Ph.D.—I’d been kicked out of Harvard’s Department of Psychology with only a master’s degree. I had been stuck at home for many years due to chronic health problems; I had no mentors, no students. I became a writer of textbooks because that is something one can do at home. I was an unemployed writer of textbooks because I’d quit that job.
I never heard from him again. But others who got the same explanation did write back, and some of them have become my friends and colleagues. As yet I have met none of them in person; my link to the academic world is entirely through e-mail and postal mail.
In 1997, my article in the Psychological Review was chosen to receive a prize given by the American Psychological Association to an outstanding recent article in psychology.
The prize is named the George A. Miller Award, after a prominent psychologist and former president of the APA. It was proof that the gods do have a sense of humor. Thirty-seven years earlier I had received a letter from Harvard’s Department of Psychology; they had decided, the letter said, that they didn’t want to give me a Ph.D. because they didn’t think I’d amount to much. The letter was signed by the Acting Chairman of the Department, George A. Miller.
In the years between my two encounters with the name of George A. Miller, I married one of my fellow graduate students (I am married to him still) and we reared two daughters; they appear, from time to time, on the pages of this book. I was in good health when I married and remained so for about fifteen years, but I made no attempt to return to graduate school. I didn’t do anything to prove that Harvard had been wrong about me because I assumed they were right.
Getting sick was what changed my mind. Perhaps it was the intimations of mortality (if you think you might die in a fortnight, it concentrates the mind wonderfully); perhaps it was simple boredom. Confined to bed for a period of time, I started doing the kind of work that my professors at Harvard would have approved of. Some of it even got published.²
Fortunately, the metamorphosis came too late to permit me to go back to graduate school. And thus I escaped indoctrination. Whatever I learned about developmental psychology and social psychology, I learned on my own. I was an outsider looking in, and that has made all the difference. I did not buy into the assumptions of the academic establishment. I was not indebted to their granting agencies. And, once I had given up writing textbooks, I was not required to perpetuate the status quo by teaching the received gospel to a bunch of credulous college students. I gave up writing textbooks because one day it suddenly occurred to me that many of the things I had been telling those credulous college students were wrong.
If possible,
counseled a physician on the pages of the Journal of the American Medical Association, the effectiveness of an effort should be determined by someone outside the effort who has nothing to gain by its perpetuation.
³In other words, if you want to know the truth about the emperor’s clothes, don’t ask the tailors.
Though I am not one of them, I am deeply in their debt, because the theory of child development presented in this book is based in large part on the research produced by the academic establishment. In particular, I am grateful to the many members of the academic world who, over the years, responded so generously to my requests for copies of their published articles.
Not having access to a university library is an inconvenience that can be overcome. Public libraries served me well by providing me with scores of books borrowed from university shelves. My thanks to Mary Balk of the Middletown (New Jersey) Library and Jane Eigenrauch of the Red Bank Library for the many books they obtained for me on interlibrary loan. Thanks, too, to the helpful people—especially Joan Friebely, Sabina Harris, and David G. Myers—who sent me additional reading material by mail.
Many people helped to keep me from feeling isolated. My first e-mail friends in the academic world, Neil Salkind and Judith Gibbons, made me realize that shut in
does not necessarily mean shut out.
Daniel Wegner saw to it that the manuscript I submitted to the Psychological Review got fair treatment; his comments challenged me to think more deeply about some of the assertions I made in the first version of the article, which led to improvements not only in the article but in the theory as well. The advice and encouragement I received from Steven Pinker, from my literary agent, Katinka Matson of Brockman, Inc., from my first editor at the Free Press, Susan Arellano, and from my second editor, Liz Maguire, were of tremendous value. A million thanks to all these people. Thanks also to Florence Metzger, who kept my house clean and gave me, as a bonus, her cheerfulness and kindness.
My colleagues, friends, and members of my family made generous contributions of their time and expertise to read and comment upon earlier drafts of this book. I am deeply grateful to them for their comments, which lifted my spirits and my prose and kept me from making some embarrassing errors. Susan Arellano, Joan Friebely, Charles S. Harris, Nomi Harris, David Lykken, David G. Myers, Steven Pinker, and Richard G. Rich read and made perspicacious comments on the entire manuscript. Anne-Marie Ambert, William Corsaro, Carolyn Edwards, Thomas Kindermann, and John Modell did the same for parts of the book in their areas of interest.
My daughters, my son-in-law, my brother, and—most of all—my husband provided me with the support a writer needs. They put up with me; they believed in me. They have my love and my eternal gratitude.
Judith Rich Harris
Middletown, New Jersey
April 1998
The NURTURE ASSUMPTION
1 NURTURE
IS NOT THE SAME AS ENVIRONMENT
Heredity and environment. They are the yin and yang, the Adam and Eve, the Mom and Pop of pop psychology. Even in high school I knew enough about the subject to inform my parents, when they yelled at me, that if they didn’t like the way I was turning out they had no one to blame but themselves: they had provided both my heredity and my environment.
Heredity and environment
—that’s what we called them back then. Nowadays they are more often referred to as nature and nurture.
Powerful as they were under the names they were born with, they are yet more powerful under their alliterative aliases. Nature and nurture rule. Everyone knows it, no one questions it: nature and nurture are the movers and shapers. They made us what we are today and will determine what our children will be tomorrow.
In an article in the January 1998 issue of Wired, a science journalist mused about the day—twenty? fifty? a hundred years from now?—when parents will be able to shop for their children’s genes as easily as today they shop for their jeans. Genotype choice,
the journalist called it. Would you like a girl or a boy? Curly hair or straight? A whiz at math or a winner of spelling bees? It would give parents a real power over the sort of people their children will turn out to be,
he said. Then he added, But parents have that power already, to a large degree.
¹
Parents already have power over the sort of people their children will turn out to be, said the journalist. He meant, because parents provide the environment. The nurture.
No one questions it because it seems self-evident. The two things that determine what sort of people your children will turn out to be are nature—their genes—and nurture—the way you bring them up. That is what you believe and it also happens to be what the professor of psychology believes. A happy coincidence that is not to be taken for granted, because in most sciences the expert thinks one thing and the ordinary citizen—the one who used to be called the man on the street
—thinks something else. But on this the professor and the person ahead of you in the checkout line agree: nature and nurture rule. Nature gives parents a baby; the end result depends on how they nurture it. Good nurturing can make up for many of nature’s mistakes; lack of nurturing can trash nature’s best efforts.
That is what I used to think, too, before I changed my mind.
What I changed my mind about was nurture, not environment. This is not going to be one of those books that says everything is genetic; it isn’t. The environment is just as important as the genes. The things children experience while they are growing up are just as important as the things they are born with. What I changed my mind about was whether nurture
is really a synonym for environment.
Using it as a synonym for environment, I realized, is begging the question.
Nurture
is not a neutral word: it carries baggage. Its literal meaning is to take care of
or to rear
; it comes from the same Latin root that gave us nourish and nurse (in the sense of breast-feed
). The use of nurture
as a synonym for environment
is based on the assumption that what influences children’s development, apart from their genes, is the way their parents bring them up. I call this the nurture assumption. Only after rearing two children of my own and coauthoring three editions of a college textbook on child development did I begin to question this assumption. Only then did I come to the conclusion that it is wrong.
It is difficult to disprove assumptions because they are, by definition, things that do not require proof. My first job is to show that the nurture assumption is nothing more than that: simply an assumption. My second is to convince you that it is an unwarranted assumption. My third is to give you something to put in its place. What I will offer is a viewpoint as powerful as the one it replaces—a new way of explaining why children turn out the way they do. A new answer to the basic question of why we are the way we are. My answer is based on a consideration of what kind of mind the child is equipped with, which requires, in turn, a consideration of the evolutionary history of our species. I will ask you to accompany me on visits to other times and other societies. Even chimpanzee societies.
Beyond a Reasonable Doubt?
How can I question something for which there is so much evidence? You can see it with your own eyes: parents do have effects on their kids. The child who has been beaten looks cowed in the presence of her parents. The child whose parents have been wimpy runs rampant over them. The child whose parents failed to teach morality behaves immorally. The child whose parents don’t think he will accomplish much doesn’t accomplish much.
For those doubting Thomases who have to see it in print, there are books full of evidence—thousands of books. Books written by clinical psychologists like Susan Forward, who describes the devastating and long-lasting effects of toxic parents
—overcritical, overbearing, underloving, or unpredictable people who undermine their children’s self-esteem and autonomy or give them too much autonomy too soon. Dr. Forward has seen the damage such parents wreak on their children. Her patients are in terrible shape psychologically and it is all their parents’ fault. They won’t get better until they admit, to Dr. Forward and themselves, that it is all their parents’ fault.
But perhaps you are among those doubting Thomases who don’t consider the opinions of clinical psychologists, formed on the basis of conversations with a self-selected sample of troubled patients, to be evidence. All right, then, there is evidence of a more scientific sort: evidence obtained in carefully designed studies of ordinary parents and their children—parents and children whose psychological well-being varies over a wider range than you could find in Dr. Forward’s waiting room.
In her book It Takes a Village, written while her husband was President of the United States, Hillary Rodham Clinton summarized some of the findings from the carefully designed studies carried out by developmental psychologists. Parents who care for their babies in a loving, responsive way tend to have babies who are securely attached to them and who develop into self-confident, friendly children. Parents who talk to their children, listen to them, and read to them tend to have bright children who do well in school. Parents who provide firm—but not rigid—limits for their children have children who are less likely to get into trouble. Parents who treat their children harshly tend to have children who are aggressive or anxious, or both. Parents who behave in an honest, kind, and conscientious manner with their children are likely to have children who also behave in an honest, kind, and conscientious manner. And parents who fail to provide their children with a home that contains both a mother and a father have children who are more likely to fail in some way in their own adult lives.²
These statements, and others of a similar sort, are not airy speculation. There is a tremendous amount of research to back them up. The textbooks I wrote for undergraduates taking college courses in child development were based on the evidence produced by that research. The professors who teach the courses believe the evidence. So do the journalists who occasionally report the results of a study in a newspaper or magazine article. The pediatricians who give advice to parents base much of their advice on it. Other advice-givers who write books and newspaper articles also take the evidence at face value. The studies done by developmental psychologists have an influence that ripples outward and permeates our culture.
During the years I was writing textbooks, I believed the evidence, too. But then I looked at it more closely and to my considerable surprise it fell apart in my hands. The evidence developmental psychologists use to support the nurture assumption is not what it appears to be: it does not prove what it appears to prove. And there is a rising tide of evidence against the nurture assumption.
The nurture assumption is not a truism; it is not even a universally acknowledged truth. It is a product of our culture—a cherished cultural myth. In the remainder of this chapter I will tell you where it came from and how I came to question it.
The Heredity and Environment of the Nurture Assumption
Francis Galton—Charles Darwin’s cousin—is the one who usually gets the credit for coining the phrase nature and nurture.
Galton probably got the idea from Shakespeare, but Shakespeare didn’t originate it either: thirty years before he juxtaposed the two words in The Tempest, a British educator named Richard Mulcaster wrote, Nature makes the boy toward, nurture sees him forward.
Three hundred years later, Galton turned the pairing of the words into a catchphrase. It caught on like a clever advertising slogan and became part of our language.³
But the true father of the nurture assumption was Sigmund Freud. It was Freud who constructed, pretty much out of whole cloth, an elaborate scenario in which all the psychological ills of adults could be traced back to things that happened to them when they were quite young and in which their parents were heavily implicated. According to Freudian theory, two parents of opposite sexes cause untold anguish in the young child, simply by being there. The anguish is unavoidable and universal; even the most conscientious parents cannot prevent it, though they can easily make it worse. All little boys have to go through the Oedipal crisis; all little girls go through the reduced-for-quick-sale female version. The mother (but not the father) is also held responsible for two earlier crises: weaning and toilet training.
Freudian theory was quite popular in the first half of the twentieth century; it even worked its way into Dr. Spock’s famous book on baby and child care:
Parents can help children through this romantic but jealous stage by gently keeping it clear that the parents do belong to each other, that a boy can’t ever have his mother to himself or a girl have a father to herself.⁴
Not surprisingly, it was psychiatrists and clinical psychologists (the kind who see patients and try to help them with their emotional problems) who were most influenced by Freud’s writings. However, Freudian theory also had an impact on academic psychologists, the kind who do research and publish the results in professional journals. A few tried to find scientific evidence for various aspects of Freudian theory; these efforts were largely unsuccessful. A greater number were content to drop Freudian buzzwords into their lectures and research papers.
Others reacted by going to the opposite extreme, dumping out the baby with the bathwater. Behaviorism, a school of psychology that was popular in American universities in the 1940s and ’50s, was in part a reaction to Freudian theory. The behaviorists rejected almost everything in Freud’s philosophy: the sex and the violence, the id and the superego, even the conscious mind itself. Curiously, though, they accepted the basic premise of Freudian theory: that what happens in early childhood—a time when parents are bound to be involved in whatever is going on—is crucial. They threw out the script of Freud’s psychodrama but retained its cast of characters. The parents still get leading roles, but they no longer play the parts of sex objects and scissor-wielders. Instead, the behaviorists’ script turns them into conditioners of responses or dispensers of rewards and punishments.
John B. Watson, the first prominent behaviorist, noticed that real-life parents aren’t very systematic in the way they condition their children’s responses and offered to demonstrate how to do the job properly. The demonstration would involve rearing twelve young humans under carefully controlled laboratory conditions:
Give me a dozen healthy infants, well-formed, and my own specified world to bring them up in and I’ll guarantee to take any one at random and train him to become any type of specialist I might select—doctor, lawyer, artist, merchant-chief, and, yes, even beggar-man and thief, regardless of his talents, penchants, tendencies, abilities, vocations, and race of his ancestors.⁵
Fortunately for the dozen babies, no one took Watson up on his proposal. To this day, there are probably some aging behaviorists who think he could have pulled it off, if only he had had the funding. But in fact it was an empty boast—Watson wouldn’t have had the foggiest idea of how to fulfill his guarantee. In his book Psychological Care of Infant and Child he had lots of recommendations to parents on how to keep their children from being spoiled
and how to make them fearless and self-reliant (you leave them alone and avoid showing them affection)⁶ but there were no suggestions on how to raise children’s IQs by twenty points, which would seem to be an important step toward getting them into medical or law school, in preparation for the first two occupations on Watson’s list. Nor were there any guidelines for how to make them choose medicine over law, or vice versa. When it got right down to it, the only thing John Watson had succeeded in doing was to produce conditioned fear of furry animals in an infant named Albert, by making a loud noise whenever little Albert reached for a rabbit.⁷ Although this training may have discouraged Albert from growing up with the idea of becoming a veterinarian, he still had plenty of other career options to choose from.
A more promising behavioristic approach was that of B. F. Skinner, who talked about reinforcing responses rather than conditioning them.⁸ This was a far more useful method because it didn’t have to make do with responses the child was born with—it could create new responses, by reinforcing (with rewards such as food or praise) closer and closer approximations to the desired behavior. In theory, one could produce a doctor by rewarding a kid for bandaging a friend’s wounds, a lawyer by rewarding the kid for threatening to sue the manufacturer of the bike the friend fell off. But what about the third occupation on Watson’s list, artist? Research done in the 1970s showed that you can get children to paint lots of pictures simply by rewarding them with candy or gold stars for doing so. But the rewards had a curious effect: as soon as they were discontinued, the children stopped painting pictures. They painted fewer pictures, once they were no longer being rewarded, than children who had never gotten any rewards for putting felt-tip pen to paper. Although subsequent research has shown that it is possible to administer rewards without these negative aftereffects, the results