Ideas about mothers have swung historically with the roles of women. When women were needed to work the fields or shops, experts claimed that children didn't need them much. Mothers, who might be too soft and sentimental, could even be bad for children's character development. But when men left home during the Industrial Revolution to work elsewhere, women were "needed" at home. The cult of domesticity and motherhood became a virtue that kept women in their place.

The time-use studies also show that employed women spend as much time as nonworking women in direct interactions with their children. Employed mothers spend as much time as those at home reading to and playing with their young children, although they do not, of course, spend as much time simply in the same room or house with the children.

A healthy newborn has been delivered in a more or less satisfying fashion. The baby is feeding well, has short nails and a clean bottom, and has not drowned. What now?

Parents who are cowed by temper tantrums and screaming defiance are only inviting more of the same. Young children become more cooperative with parents who confidently assert the reasons for their demands and enforce reasonable rules. Even if there are a few rough spots, relationships between parents and young children run more smoothly when the parent, rather than the child, is in control.

Parents sometimes think of newborns as helpless creatures, but in fact parents' behavior is much more under the infant's control than the reverse. Does he come running when you cry?

Each era invents its own child. Over the past 500 years, conceptions of the child changed gradually from an ill-formed adult who must be subjugated to society's goals to a precious being who must be protected from unreasonable social demands. Childhood has come to be seen as a special period of life, rather than as a temporary state of no lasting importance for adulthood.

Mothers have not always had the most important role in their children's upbringing, when they had other economic roles to play. Inpast centuries, fathers were the key parent in the upbringing of the next generation, because moral training, not emotional sensitivity, was thought to be central to successful child-rearing. Mothers were thought to corrupt their little ones with too much affection and not enough stern training.