One reason, of course, is that children provide jobs. Jobs for more than 1.3 million elementary school teachers, for 13 million stay-at-home mothers, for the makers of the 1.3 million infant and toddler car seats sold in the United States in 1980; jobs, too, for many of the 2,768 psychologists who received their Ph.D.s that same year. The very existence of children, moreover, im- plies that the economy is in for a long run.
Children keep democracy fit. Without kids there would be no PTA. Local...