There is always a large variation within population.
Accept the premise 1/2 of the population of women refuse to procreate.
The offspring of the women who want to procreate will be more likely to procreate.
In a few generations, at most a few hundred years, we are back to where we are to day.
Most likely, less than a hundred years.
“Accept the premise 1/2 of the population of women refuse to procreate.
The offspring of the women who want to procreate will be more likely to procreate.
In a few generations, at most a few hundred years, we are back to where we are to day.
Most likely, less than a hundred years.”
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I don’t know about China but in the US where the lower portions of the IQ Bell Curve are doing the most procreating, in a hundred years we’ll be NOWHERE NEAR where we are now in the “quality” of the population.