Originally posted by Kassiopeia
My guess would be that the US has more religions that allow and cause larger families and thus higher birthrates. The Mormons are a marginal group, but the Mexicans and Catholics (or even more, Catholic Mexicans) are another story. Europe, on the other hand, is mostly Protestant, excluding Italy, Spanish, Portugal and other possible smaller countries, and I think Catholism isn't practiced that fanatically as it is in the States.
My guess would be that the US has more religions that allow and cause larger families and thus higher birthrates. The Mormons are a marginal group, but the Mexicans and Catholics (or even more, Catholic Mexicans) are another story. Europe, on the other hand, is mostly Protestant, excluding Italy, Spanish, Portugal and other possible smaller countries, and I think Catholism isn't practiced that fanatically as it is in the States.
I don't know if Europe as a whole is even half Protestant.
You've got UK, Germany, Nordic countries (can't remember if Swedes are Lutherans or Catholics) Switzerland and parts of Austria for a grand total in the neighbourhood of 150? million out of a total pop of 300 million. The rest are either Orthodox or Catholic.
Comment