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The idea of a "brain in a vat" is not without reason. After all, we no longer need sharp teeth and claws to tear at prey since we've learnt to process food with fire and various tools; nor do we need strong limbs to run because we have created various means of transportation that take us wherever we want, even into space where life cannot naturally tread; and we don't need claws for weapons because we possess the most efficient tools for slaughter and destruction on this planet to vent our desires for killing and ravaging...
But what if we had a body to match our brain? What if we could optimize our flesh through some means so that our genes, organs, skeleton, nervous system, and even our internal microbiome – everything, evolved to a perfect state matching our brains? What would humankind look like then, at such a formidable level?