“What advances?” Malcolm said irritably. “The number of hours women devote to housework has not changed since 1930, despite all the advances. All the vacuum cleaners, washer-dryers, trash compactors, garbage disposals, wash-and-wear fabrics … Why does it still take as long to clean the house as it did in 1930?”

Children, in particular, have suffered a grievous decline in just the goods that are most important to them: adult time, energy, and company. The child-rearing work that men and women and an extended family did a hundred years ago, and that women did thirty years ago, has to be done somehow by someone. The scientific moral is not that we need exper