Here's an interesting (and kind of scary) Times Online article about a study by Gregory Paul in "Journal of Religion and Society" that finds a high correlation between religiosity and social dysfunction in developed democracies:
http://www.timesonline.co.uk/article/0,,2-1798944,00.html
And for those who have the time to actually read the study being quoted here.
http://moses.creighton.edu/JRS/2005/2005-11.html
I had to Google around for this, since Times Online didn't bother to specify which university Gregory Paul was affilliated.