IQ-Cooperation Link Is Machiavellian, Not Prosocial

The link between IQ and cooperation in repeated games is driven by Machiavellian intelligence that becomes Coasean intelligence—smart people find cynical, self-interested ways to grow the pie—rather than inherent prosociality; in the last turn of an iterated prisoner's dilemma the smart walk away, so it is endogenous, not exogenous, prosociality, which is a reason to worry.