To facilitate cooperation, moral externalization requires truthful and meticulous information about others’ moral commitments (Stanford target article, sect. 6). By definition, this information does not exist in the low-information environments where humans display their “hypercooperativeness.” Furthermore, collecting that information – if possible – entails costs that other mechanisms for correlated interaction avoid. Hence, moral externalization is an unlikely mechanism for cooperation, let alone “hypercooperation.”
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