Review evolutionary theory
"people who fit in--sharing the food they found, joining in hunting, helping to defend the group and so on--would have given their group a collective advantage, and thus themselves an individual evolutionary advantage." based on Sam Bowles Sante Fe Institute and University of Siena...ecoomist turned evolutionary biologist 96 also she suggests from bowles that conformity ("ability to fit in with a group and adopt its norms and customs" may have evolved in humans, 96 Then goes over evidence of people's plesaure (neurocience records) both in coopeartion and in punishing people who aren't fair......
Olivia Judson, The Selfless Gene, Atlantic, October 2007, 89-98.