Original: Christopher Boehm ( 1999 ) '' Hierarchy in the Forest : The Evolution of Egalitarian Behavior '' page 198-208 Harvard university press Middle Paleolithic societies , unlike Lower Paleolithic and early Neolithic ones , consisted of bands that ranged from 20 to 30 or 25 to 100 members and were usually nomadic .
Simplified: Footnotes References Christopher Boehm ( 1999 ) '' Hierarchy in the Forest : The Evolution of Egalitarian Behavior '' page 198 Harvard university press Leften Stavros Stavrianos ( 1991 ) .