Jerry Coyne has a very interesting post discussing a new study by F. Solt, P. Habel, and J. T. Grant, J. T. titled Economic inequality, relative power, and religiosity that appeared in the journal Social Science Quarterly, 92: 447–465 (2011), that finds that economic inequality is positively correlated with religious belief, and looks at theories that might account for this.
The most common theory is called “deprivation theory” which says that in economically unequal societies, poorer folks turn to religion for reassurance and comfort. The authors of the paper introduce something called “relative power theory” that says that “many wealthy individuals, rather than simply allowing redistribution to be decided through the democratic process as such median-voter models assume, respond to higher levels of inequality by adopting religious beliefs and spreading them among their poorer fellow citizens. Religion then works to discourage interest in mere material well-being in favor of eternal spiritual rewards, preserving the privileges of the rich and allowing unequal conditions to continue.”
Coyne summarizes the conclusions of the paper.
Their findings thus 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.
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The authors also note that the relative power theory explains why the U.S. is so religious despite the fact that its citizens are generally well off. It is, they say, because the U.S. shows considerably more economic inequality than other developed countries (and that is true).
The authors also did a time-study and found that “Increases in inequality in one year predict substantial gains in religiosity in the next,” while “past values of religiosity do not predict future values of inequality” clearly indicating that it is inequality that influences religiosity and not the other way around.
A heartening sign is the trend of declining religiosity in America over the last half century.

Of course, this predicts that the recent rise in inequality in the US will see an uptick in religiosity. But it seems that the overall tendency is for religion to decline.
Both the original paper and Coyne’s summary make for fascinating reading.
What appealed to me is the inference that the fights for economic justice and the elimination of religion are related, since those are two of my personal goals.

