Quote:
you explicity restate that same point - without mentioning the cause for that behavior
|
The differentiation between "within-group" and "everyone else" is an instinctive component of human behavior, though it's heavily built upon by cultural evolution as well. I am inclined to agree with D S Wilson's argument that this feature of human behavior is actually a group-level adaptation. Social collectives in which members make a strong distinction regarding within vs. between group rules tend to replace social collectives that do not.