Evidence is reviewed pointing to a negative relationship between intelligence and religious belief in the United States and Europe. It is shown that intelligence measured as psychometric g is negatively related to religious belief. We also examine whether this negative relationship between intelligence and religious belief is present between nations. We find that in a sample of 137 countries the correlation between national IQ and disbelief in God is 0.60.
Source: “Average intelligence predicts atheism rates across 137 nations” from Intelligence Volume 37, Issue 1, January-February 2009, Pages 11-15
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