From Newsweek (believe it or not):
In brief, the number of American non-believers has doubled since 1990, a 2008 Pew survey found, and increased even more in some other advanced democracies. What’s curious is not so much the overall decline of belief (which has caused the Vatican to lament the de-Christianization of Europe) as the pattern. In a paper last month in the online journal Evolutionary Psychology, Gregory Paul finds that countries with the lowest rates of social dysfunction—based on 25 measures, including rates of homicide, abortion, teen pregnancy, sexually transmitted disease, unemployment, and poverty—have become the most secular. Those with the most dysfunction, such as Portugal and the U.S., are the most religious, as measured by self-professed belief, church attendance, habits of prayer, and the like.
What is also disturbing about this is that the US is considered a country with more dysfunction.