Just came over interesting OpenCourseWare page about 4 fundamentally different types of rights:
claim-rights
privileges (liberties, absence of claim-rights)
powers (authority rights)
immunities (absence of power rights)
The Dunbar Number
there is a cognitive limit to the number of individuals with whom any one person can maintain stable relationships, that this limit is a direct function of relative neocortex size, and that this in turn limits group size ... the limit imposed by neocortical processing ...
