Oh, I'm not all that dogmatic or sure of anything in life, so I don't think it's crazy to suspect some sort of environmental/biological factor. But I think the

Oh, I'm not all that dogmatic or sure of anything in life, so I don't think it's crazy to suspect some sort of environmental/biological factor. But I think the "Death of God" is reality; it's true across all cultures and people eventually realize it. My understanding is that religiosity is the biggest predictor of fertility. What environmental factor would correlate with fertility? My understanding is that Africa and Israel as examples still have high fertility rates - what environmental factor are they missing that affects most of the rest of the world?