The data available on the subject of intelligence and religiosity seems to show that there is a negative correlation between the two (the more intelligent the person, the less likely it is to be religious).
Average intelligence predicts atheism rates across 137 nations (Lynn, Harvey, Nyborg, 2009).
[URL unfurl="true"]http://www.sciencedirect.com/science/article/pii/S0160289608000238[/URL]
IQ predicts atheism rates, monogamy rates, and liberal values (Kanazawa, 2009).
[URL unfurl="true"]https://www.cambridge.org/core/journals/journal-of-biosocial-science/article/iq-and-the-values-of-nations/B28886FC682668151084DF2E9DC5C0AF[/URL]
IQ is positively associated with breastfeeding rates, immunization rates, rates of mammography screening, and negatively associated with teen fertility rates and infant mortality rates (Reeve, Basalik, 2011).
[URL unfurl="true"]http://www.sciencedirect.com/science/article/pii/S0160289610001157[/URL]