Biggest story of our time: our self-extinction by Mark Steyn

[Copernicus]

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This is not an issue.

Those who have lots of children will tend to propagate, those who have few children will not. This "problem" is self-correcting. Right now the population may be shrinking, but as those who decide not to have children are removed from the gene pool, those who want to reproduce will very quickly grow in proportion. Moreover, as the population shrinks the incentives for having children grow.

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I wasn't aware that the desire to want kids or not want kids was a gene. I could be wrong but that sounds like crazy talk to me.

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It might not be totally crazy, but since any tendency to want/not want kids would certainly result from multiple alleles their rise to dominance would be extremely slow, and probably not sufficient to overcome societal influences. Look how quickly ZPG took over the tendency toward > than self-sustaining reproduction rates.