4 ms·
Reciprocity predates humanity by many millions of years: https://en.wikipedia.org/wiki/Reciprocal_altruism https://en.wikipedia.org/wiki/Reciprocal_altruism
by MichaelCollins 4y ago
Reciprocity predates humanity by many millions of years: https://en.wikipedia.org/wiki/Reciprocal_altruism https://en.wikipedia.org/wiki/Reciprocal_altruism