The sentence and intelligence we enjoy isn’t an end point of natural selection. Evolution has no end point. Each species is best evolved to fit its specific environment.
Crocodiles have remained unchanged for millions of years because there is simply no need for them to change. They are a killing machine that perfectly fits that specific environment they live in.
I understand the question you’re asking, but it’s framed in a way that our sentience is the end goal of natural selection. Human are and will continue to evolve.
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