Karl Zinsmeister's essay Old and In The Way presents a startling — but all too plausible — forecast of Europe's future. To the now-familiar evidence of European insularity, reflexive anti-Americanism, muddle, and geopolitical impotence, Zinsmeister adds a hard look at European demographic trends. What Zinsmeister sees coming is not pretty. European populations are not having children at replacement levels. The population of Europe is headed for collapse, and for an age profile heavily skewed towards older people and retirees. Europe's Gross Domestic Product per capita (roughly, the amount of wealth the average person produces) is already only two-thirds of America's,...