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And evolved creatures are incomplete machines. We didn't just evolve to a diet from 300,000 or 30,000 or 3,000 years ago. We accumulated adaptations suited to

And evolved creatures are incomplete machines. We didn't just evolve to a diet from 300,000 or 30,000 or 3,000 years ago. We accumulated adaptations suited to all of those diets -- and genetic drift that made us unsuited to anything else -- and then our diet shifted and we began adapting to new foodstuffs instead. There's no factory default diet for us to reset to. It was always a moving target.

deegles 5y ago
> we began adapting to new foodstuffs This would only be true if groups of people who eat certain foods reproduce less than other groups. Otherwise you're thinking of Lamarckism[0]. With modern medicine, people can eat suboptimal diets their whole lives... [0]https://en.wikipedia.org/wiki/Lamarckism https://en.wikipedia.org/wiki/Lamarckism
- saalweachter 5y ago
  Of course how well an animal digests the food it is eating affects its survival and the survival of its offspring? If your tribe of anatomically modern homo sapiens sapiens moves to the sea shore for a thousand years because environmental changes have made your previous lifestyle impossible, mutations that correlate with shelf fish allergies are going to be highly disadvantageous, for instance. If wheat farming is all the rage, anyone who can digest gluten is going to have way more offspring than anyone who can't.