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Cry baby cry, make your mother buy? Evolution of tears, smiles, and reciprocity potential
Published online by Cambridge University Press: 14 October 2009
Abstract
In this commentary, the idea of reciprocity potential indicators is tied in with ultimate accounts on sex differences in social sensitivity. It is proposed that, rather than crying, smiling is a more likely cooperative signal. The possibility of coevolution and polymorphism in perceptual and signalling systems are also discussed briefly, with a reference to Theory of Mind and Machiavellianism.
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- Open Peer Commentary
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- Copyright © Cambridge University Press 2009
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