Demographic negative-entropy is speciation (which still apparently lies outside the Overton Window).
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Replying to @Outsideness
... Intriguing to speculate how long speciation can hide itself within assortative mating, before people recognize it for what it is.
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Replying to @puellavulnerata @lunavis
The point at which speciation occurs is an interesting question. ...
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... Once, even retrospectively, two (or more) non-crossing gene-pools can be identified, it has begun. ...
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... There's no need for it to be at all evident that the biological event has occurred, at the time.
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... Because we see the (in principle) potential, rather than the virtual (future-realized) crosses, we miss it.
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... Begin, in the future, with a disintegrated human species (Alastair Reynolds' will do fine) ...
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... then trace back their lineages, to the point immediately subsequent to a last common ancestor, i.e. ...
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... the point of cladistic schism. How deep into history, quite probably even into our time, will that go?
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