Caplan: How Many Would Have Been A Mozart Or Einstein?

Bryan Caplan, on the birth of his third son, quotes Julian Simon:

One spring day about 1969 I visited the U.S. AID office on the outskirts of Washington, D.C., to discuss a project intended to lower fertility in less-developed countries. I arrived early for my appointment, so I strolled outside in the warm sunshine. Below the building's plaza I noticed a road sign that said "Iwo Jima Memorial." There came to me the memory of reading a eulogy delivered by a Jewish chaplain over the dead on the battlefield at Iwo Jima, saying something like, "How many who would have been a Mozart or a Michelangelo or an Einstein have we buried here?" And then I thought, Have I gone crazy? What business do I have trying to help arrange it that fewer human beings will be born, each one of whom might be a Mozart or a Michelangelo or an Einstein - or simply a joy to his or her family and community, and a person who will enjoy life.