But among white, middle-class Americans, religious people are having children at a much higher rate. More and more and more children percentage-wise than non-religious people. There's a survival value in religious beliefs. They have a sense of purpose. They feel their mission in life is to multiply and be fruitful. The whole Darwinian concept -- evolution -- is on the side of evangelical Christians. They're growing by any measure.
Apparently, unlike the god that most evangelicals espouse, evolution helps you even if you don't believe in it.