Abstract:Group-contingent prosociality pervades human societies but the payoffs associated with intergroup tolerance and cooperation act as counterforces. Kinship terms (e.g. 'brother') and affiliative terms (e.g. 'mate') have been proposed to function to create strong bonds among in-group members but it is unknown if they play a role in establishing or strengthening between-group ties. To explore that possibility we conducted a psychological experiment whereby we recorded six speeches by three male speakers that diffe… Show more
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