A couple may be the only people who can decide whether to welcome another child. Other people have already helped shape the decision: the employer who sets the schedule, the city that permits or prevents a nearby home, the grandparents who move closer or farther away, the neighbors who become friends or remain strangers, and the government that decides how much of care belongs to a household alone.
No one of them controls the fertility rate. Each holds some part of the world in which a family forms.
That is where the book’s longest horizon returns to the present. The choice between contraction and renewal will not be made once, by one legislature or one generation. It will emerge from decisions made by people with unequal powers, different duties, and boundaries they should not cross.
Much of the next few decades is already set. The missing cohorts cannot be restored as adults, and a child born into recovery will need years of care before she adds to public capacity. A decent society must adapt to the older world arriving now. It should do so without arranging every institution around the expectation that the next generation will be smaller again.
The direction should be renewal. That judgment is not a command that every person have children, a promise that government can engineer replacement fertility, or an excuse to transfer every cost to families. It is a commitment to use each kind of authority for the work proper to it: make family life more attainable, honor the obligations through which children are welcomed and formed, care for people through contraction, and preserve room for successors to build beyond what we received.