During one of his many trips to Gusiiland in southwestern Kenya, anthropologist Robert LeVine tried an experiment: he showed a group of Gus mothers a videotape of middle-class American women tending their babies. The Gusii mothers were appalled. Why does that mother ignore the cries of her unhappy baby during a simple diaper change? And how come that grandmother does nothing to soothe the screaming baby in her lap? These American women, the Gus concluded, are clearly incompetent mothers. In response, the same charge might be leveled at the Gus by American mothers. What mother hands over her tiny infant to a six-year-old sister and expects the older child to provide adequate care? And why don't those Gus women spend more time talking to their babies, so that they will grow up smart?
Both culture-the traditional way of doing things in a particular society-and individual experience guide parents in their tasks. When a father chooses to pick up his newborn and not let it cry, when a mother decides to bottle-feed on a schedule rather than breastfeed on demand, when a couple bring the newborn into their bed at night, they are prompted by what they believe to be the best methods of caregiving.
For decades, anthropologists have been recording how children are raised in different societies. At first, the major goals were to describe parental roles and understand how child-rearing practices and rituals helped to generate adult personality. In the 1950s, for example, John and Beatrice Whiting, and their colleagues at Harvard, Yale, and Cornell Universities, launched a major comparative study of childhood, looking at six varied communities in different regions: Okinawa, the Philippines, northern India, Kenya, Mexico, and New England. They showed that communal expectations play a major role in setting parenting styles, which in turn play a part in shaping children to become accepted adults.
More recent work by anthropologists and child-development researchers has shown that parents readily accept their society's prevailing ideology on how babies should be treated, usually because it makes sense in their environmental or social circumstances. In the United States, for example, where individualism is valued, parents do not hold babies as much as in other cultures, and they place them in rooms of their own to sleep. Pediatricians and parents alike often say this fosters independence and self-reliance. Japanese parents, in contrast, believe that individuals should be well integrated into society, and so they "indulge" their babies: Japanese infants are held more often, not left to cry, and sleep with their parents. Efe parents in Congo believe even more in a communal life, and their infants are regularly nursed, held, and comforted by any number of group members, not just parents. Whether such practices help form the anticipated adult personality traits remains to be shown, however.
Recently, a group of anthropologists, child-development experts, and pediatricians have taken the cross-cultural approach in a new direction by investigating how differing parenting styles affect infant health and growth. Instead of emphasizing the development of adult personality, these researchers, who call themselves ethnopediatricians, focus on the child as an organism. Ethnopediatricians see the human infant as a product of evolution, geared to enter a particular environment of care. What an infant actually gets is a compromise, as parents are pulled by their offspring's needs and pushed by social and personal expectations.
Compared with offspring of many other mammals, primate infants are dependent and vulnerable. Baby monkeys and apes stay close to the mother's body, clinging to her stomach or riding on her back, and nursing at will. They are protected in this way for many months, until they develop enough motor and cognitive skills to move about. Human infants are at the extreme: virtually helpless as …