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THE GENIUS OF CHARLES DARWIN -- ILLUSTRATED SCREENPLAY & SCREENCAP GALLERY |
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where they encounter each other repeatedly,
genes for returning favors can survive.
Individuals sacrifice themselves for each other.
They give food to each other, to close kin
and to other individuals who might be in a position
to pay back favors on another occasion.
Selfish genes give rise to altruistic individuals.
[Horn honks]
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