The Handbook of Evolutionary Psychology, Volume 2 by Buss David M

Author:Buss, David M.
Language: eng
Format: epub
ISBN: 9781118755808
Publisher: John Wiley & Sons, Inc.
Published: 2015-10-26T00:00:00+00:00

Alliances With Kin

Social psychologists traditionally focused relatively little attention on the differences between interactions among kin versus nonkin (Daly, Salmon, & Wilson, 1997). However, cooperative relationships in traditional societies have most frequently involved individuals who were genetically related. From the perspective of Inclusive Fitness Theory (Hamilton, 1964), it is easy to see why people align themselves with their kin: Benefits shared with a kin member implies indirect genetic benefits to oneself, and costs exacted on the self by kin are also indirect costs to them (Kenrick, Sundie, & Kurzban, 2008). Consistently, research with humans and other species suggests lower thresholds for engaging in various types of cooperative behavior among neighbors who are closely related (Burnstein, Crandall, & Kitayama, 1994; Essock-Vitale & McGuire, 1985; Neyer & Lang, 2003; Segal & Hershberger, 1999). Indeed, people are more likely to cooperate with someone is if his or her morphological features make the person merely appear to be genetically related (DeBruine, 2002; Rushton, 1989).

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