GOD AND THE BIRTH DEARTH
I read this argument, and found myself tugged along by the argument, I think there's some wisdom in it.  Here's the conclusion:
 

In post-Christian Europe — where fertile women who not so long ago would have had three children by the age of 24 now have one designer child at 39, where social welfare programmes depend on a growing population, where the main source of immigration is from a culture that despises secularism as weak, short-sighted narcissism — societal ‘forgetfulness’ isn’t just a passing phase you can snap out of. In this situation, the Christian fundamentalists, Holy Rollers, born-again Bible Belters and Jesus freaks of America are the rationalists. It’s the hyper-rationalists of secular Europe who are living on blind faith.

 
Follow the link if you're curious how he gets there.