How's this for a display of human kin selection: Subjects were given a scenario of a bus hurtling toward a human and a nondescript dog, and they could only save one. Whom would they pick? It depended on degree of relatedness, as one progressed from sibling {1 percent chose the dog over the sibling} to grandparent {2 percent} to distant cousin {16 percent} to foreigner {26 percent}.55"
( Robert M. Sapolsky )
[ Behave: The Biology of Humans ]
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