Like North Korea?
No. I was in fact thinking of countries where religious faith is strong and widespread and yet, for some reason, illiteracy is high, infant mortality is through the roof and life expectancy is in the toilet, desperate poverty and treatable diseases are rife, the gap between rich and poor is wider than Nina Hartley's knees - Latin American nations, sub-Saharan African countries, and so forth.
As is always the case, we have to be on our guard against confusing correlation with causation, which has been the ruination of many a hopeful argument; yet equally, in the words of H. D. Thoreau, some evidence is strongly suggestive, like a trout in the milk.
Why might that be, Alan?