Vaughn, Brian E.Santos, António José2018-05-222018-05-222009In Rubin, K., Bukowski, W. & Laursen, B. (Eds.). (2009). Handbook of peer interactions, relationships, and groups. New York: Guilford Press (pp. 195-214).978-1-59385-441-6http://hdl.handle.net/10400.12/6381Describing and explaining the benefits and costs of sociality have occupied the attention of political, social, and economic philosophers and social, behavioral, and developmental scientists for over 400 years (e.g., Hobbes, Locke, Rousseau, Smith, Marx, Darwin, G. S. Hall, Baldwin, Freud, Kropotkin, J. Moreno, Hinde, Kummer, McGrath, to name a few). The fundamental questions have been why and how it is that self- interest becomes subordinated (or not) to the interests of group comembers and why or how group norms, values, and structures change as a consequence of the actions of their constituent members and/or the embedding contexts of the group.engInexistentebook part