Why is religion stronger in economically unequal societies?

[E]very single measure of religiosity–and there are 12 of them–shows a highly significant positive correlation with economic inequality. (Emphasis mine.)

[The] findings suggest that both the deprivation and relative power theories are needed to explain the data. In economically unequal societies, rich people promulgate religion to keep their own place in the hierarchy, and, rather than fighting for more equality, poor people accept religion as an easy form of solace.