"Do you see what I mean? Because of modern medicine, more and more sickly individuals get to survive and contribute to the gene pool of the species. If we keep on meddling with natural selection, we'll be left unprotected against any epidemic that comes our way."
Millions of years earlier...
"With all this taking care of the young business, they are born less and less capable of fending for themselves. If we keep on getting weaker, beasts will eventually get the better of us for good."
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