Re:Two words (Score 1)

10 to 20 individuals may have been the biological norm as humans evolved from apes, crossing the African savannah in small family groups. However, the accepted norm, for human adaptation to societal size, appears to be closer to 150 individuals. This links your later paleolithic societies right on through modern day Mennonites or other communal societies. Count your family, friends, collegues at work and neighbors, your local grocer, butcher, mailman, anyone that you are close to(Christmas Card mailing list can be a good indicator). Likely come to around 150. Of course this is /. ... ?