Another thing , since science shows evidence of a natural cycle of organic matter and matter in general , and man is matter and so he is his being , their is a natural cycle to his being wich remains undestroyed even when oblivious, meaning when you die you could very well become a thousand worms but that goes for everyone if everything is destroyed it decomposes and restarts until it is done right , but those who left are taken because some do it right.

Even then , the worst are probably taken to a different place. Because of free will wich is pre-determined by the parts used.