Australia and New Zealand are not on the list but I suspect they'd come down in the bottom right quadrant. If you took the U.S. off the chart I would certainly

Australia and New Zealand are not on the list but I suspect they'd come down in the bottom right quadrant. If you took the U.S. off the chart I would certainly suggest a causal relationship. In very general terms: the wealthier the society, the more educated and independent-minded the people, and the less likely to embrace religion. I wonder how the chart would look if you separated out all the U.S. states. I'm not from the U.S. so I'm not sure about this, but I wonder if there are distinct differences between where the various U.S. states would fall on the chart. In other words, is the correlation between the wealth of a given state and its religiosity?