From an 1840 Austrian book in the British Library online collection.
The United States is experiencing a period of low birth rates, primarily reflecting late marriages (aided by effective birth control techniques).[1] While low birth rates may harm the U.S. by holding back the number of productive workers, most historians of Europe have worried more about the Malthusian potential of overpopulation to outpace food production than about having too few people.
In fact, late marriages throughout much of European history prevented overpopulation.
Historians (and other social scientists) have compared family composition in northwestern Europe with families in other parts of the world, from southern Europe to China. Three academic papers, when combined, provide persuasive evidence that the family model of northwestern Europe not only prevented Malthusian excess but may have helped spark the Industrial Revolution.
Let me begin with John Hajnal’s 1982 article in Population and Development Review. Hajnal compared the age of marriage in preindustrial northwestern Europe (using figures from Denmark primarily, backed up by others), with those in India, China, and other parts of Europe. He found that late marriage—over age 26 for men, over age 23 for women—was the norm in northwestern Europe as early as the 1600s, while early marriage—before age 26 for men and before age 21 for women—was typical in the other areas studied.
