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A useful idea from evolution distinguishes things that survive (genes) from their vehicles (bodies they’re in). No gene survives without cooperating with other genes in its vehicle. And genes that damage their vehicle weaken themselves. Vehicles extend beyond bodies by “inclusive fitness”: Helping relatives helps shared genes. Economists could usefully apply similar ideas: - http://bigthink.com/errors-we-live-by/two-kinds-of-success-an-unnamed-natural-law