Survival of the fittest cannot be calculated in advance; it is only recognized as "fit" in hindsight.
Naturally, we can forecast some adaptable traits will be indispensable; however, the secondary cascades illuminate unforeseen weak traits as more evolutionarily beneficial.
For instance, domestication (quasi-parasitic, sacrificial survival) underscores the folly of peak physical prowess or sexual natural selection. By stripping survival instinct in favor of subservience, devolution may land some species on Mars, greatly expanding their survival odds.
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