This is a few months old, but I just came across it.
"The origins of religious disbelief "
Ara Norenzayan and Will M. Gervais
Trends in Cognitive Sciences January 2013, Vol. 17, No. 1
http://dx.doi.org/10.1016/j.tics.2012.11.006
Check out a podcast by Gervais, a University of Kentucky prof, on the origins of religious disbelief here, and read the review paper on the subject here.
