Here's the graph to accompany the earlier post by Razib. Here, religiosity is taken from the Pew Poll, and IQ from Lynn's site. Note that while the IQ data for each individual country needs to be taken with a grain of salt, overall the trends correlate well with independent measures like the Third International Mathematics and Science Survey as well as GDP-per-capita. To reiterate Razib's original point: religion and IQ are strongly negatively correlated (-.886), even more so than GDP-per-capita and IQ are strongly positively correlated (.757 w 1998 per-capita stats).

America is an outlier: the only country that couples a high mean IQ (98) & GDP-per-capita with a relatively high level of religiosity (59%). I think this graph is pretty amusing, because it manages to piss off everyone . Proponents of evolutionary psychology have few admirers among either the PC left or the religious right...