Moderate foresight tells you to stop having kids. If one infant makes you tired and cranky, why have another? High foresight has a simple response: Infancy is a passing phase, but children last a lifetime. Costs fall: The older kids get, the easier they are to care for. Last week, we left our seven-year-olds home alone for the first time; before long, they’ll be babysitting their little brother. Benefits increase over time, too. Kids who walk and talk are more fun than newborns who sleep and cry.
