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				 Re: Is there another word 
 If you're talking about the natural evolution of a species, it will not stop until it has completely adapted to all of its problems.  However, I wouldn't necessarily call that perfection.  A species will not (usually) naturally evolve (on a biological level) if it is uncomfortable.  Rather it will evolve out of necessity.
 You could be unhappy, but your body wouldn't change itself to make you happier.  And I wouldn't classify that as perfection.
 
 And at the end of it all, I don't have a word to sum it up for you.
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