|Why Young Children Protest Bedtime:
A Story of Evolutionary Mismatch
|by Peter Gray, Ph.D.
The monsters under the bed are real.
"This generation of mothers labors under the dubious pronouncement that babies sleep best in isolation.
Every infant knows better. His protest at nocturnal solitude contains the wisdom of millennia."
- Thomas Lewis, M.D.,
A General Theory of Love
Infants and young children in our culture regularly protest going to bed. They make all sorts of excuses.
They say they are not tired, when in fact they obviously are tired. They say they are hungry, or thirsty, or
need to hear a story (and then one more story) -anything to stall. They talk about being afraid of the dark,
or afraid of monsters in the closet or under the bed. Little babies without language, who can't yet describe
their fears or try to negotiate, just scream.
Why all this protest? Many years ago, the famous behavioral psychologist John B. Watson argued,
essentially, that such behavior is pathological and derives from parents' overindulgence and spoiling of
children.1 Remnants of that view still persist in books on baby care, where
the typical advice is that parents must be firm about bedtime and not give in. This, the experts say, is a
battle of wills, and you, as parent, must win it to avoid spoiling your child.
But clearly something is missing in this explanation from the experts. Why do infants and young children
choose to challenge their parents' will on this particular issue? They don't protest against toys, or
sunlight, or hugs (well, usually not). Why do they protest going to bed, when sleep is clearly good for them
and they need it?
|The answer begins to emerge as soon as we leave the Western world and look at
children elsewhere. Bedtime protest is unique to Western and Westernized cultures. In all other cultures,
infants and young children sleep in the same room and usually in the same bed with one or more adult
caregivers, and bedtime protest is non-existent.2 What infants and young
children protest, apparently, is not going to bed per se, but going to bed alone, in the dark, at night. When
people in non-Western cultures hear about the Western practice of putting young children to bed in separate
rooms from themselves, often without even an older sibling to sleep with, they are shocked. "The poor
little kids!" they say. "How could their parents be so cruel?" Those who are most shocked are
people in hunter-gatherer societies, for they know very well why young children protest against being left
alone in the dark.3
Until a mere 10,000 years ago we were all hunter-gatherers. We all lived in a world where any young child,
alone, in the dark, would have been a tasty snack for nighttime predators. The monsters under the bed or in
the closet were real ones, prowling in the jungle or savannah, sniffing around, not far from the band's
encampment. A grass hut was not protection, but the close proximity of an adult, preferably many adults, was
protection. In the history of our species, infants and young children who grew frightened and cried out to
elicit adult attention when left alone at night were more likely to survive to pass on their genes to future
generations than were children who placidly accepted their fate. In a hunter-gatherer culture only a crazy
person or an extremely negligent person would leave a small child alone at night, and at the slightest protest
from the child, some adult would come to the rescue.
When your child screams at being put to bed alone at night, your child is not trying to test your will!
Your child is screaming, truly, for dear life. Your child is screaming because we are all genetically
hunter-gatherers, and your child's genes contain the information that to lie alone in the dark is suicide.
This is an example of the concept of evolutionary mismatch. We have here a mismatch between the environment
of our evolutionary ancestors, in which our genetic being was shaped, and the environment in which we live
today. In the environment of our evolutionary ancestors, a child alone at night was in serious danger of being
eaten. Today, a child alone at night is not in serious danger of being eaten. In the environment of our
evolutionary ancestors, no sane parent - or grandparent, or uncle, or aunt, or other adult band member - would
ever let a small child sleep alone. If a child were inadvertently left too far from an adult in the dark at
night, the child's cry would be immediately heeded. Today, without the realistic dangers, the child's fear
seems irrational, so people tend to assume that it is irrational and that the child must learn to overcome it.
Or, if they read the "experts," they learn that the child is just testing their will and acting
"spoiled". And so, people battle their child rather than listen to the child and to their own gut
instincts that tell them that any crying baby needs to be picked up, held close, and cared for, not left alone
to "get over it."
What do we do about evolutionary mismatch? In this case, two alternatives appear. We can do what the
"experts" advise and engage in a prolonged battle of wills, or we can do what our genes advise and
figure out some not too inconvenient way to let our children sleep close to us.
1 Watson, J. B. (1928). Psychological care of infant and child. New York: Norton.
2 Barry, H., & Paxson, L. (1971). Infancy and early childhood: Cross-cultural codes, 2.
Ethnology, 10, 466-508. // Morelli, G. A. et al. (1992), Cultural variation in infants' sleeping arrangements.
Questions of independence. Developmental Psychology, 28, 604-613.
3 Konner (2002). The tangled wing: Biological constraints on the human spirit (2nd ed.). New
Note to readers: What do you do, or did you do, about your children's bedtime? Was it a problem? How did
you resolve it? I'm especially interested in the experiences of people who have made the choice - contrary to most
pediatricians' advice - to allow their children to sleep with them. How did you make that work?
Post comments and questions here
Peter Gray, Ph.D., a research
professor of psychology at Boston College, is a specialist in developmental and evolutionary psychology. He is the
author of an introductory textbook,
Learn, a book about children's natural ways of educating themselves, and how adults can help (Basic Books,
2013). For more information and articles, visit his blog
Freedom to Learn.
© Peter Gray, Reprinted with permission of the author.
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