The evolutionary impact of modernity
The evolution of Homo Sapiens is still taking place. It will not end until we are extinct.
That almost everybody now survives to adulthood does not alter the fact of evolution, though it does change the way that it happens. Unless every man and woman has exactly 2.1 children, the species will be pulled in one direction or another. And even under that unlikely scenario, genetic drift would occur.
Not everybody is breeding, and those that are, are having different numbers of children. Much has been made of such continental differences, and high immigrant fertility rates, but less consideration has been given to in-group reproductive phenomena.
First, who is not dying in their infancy these days, who previously would have?
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