Hunters-Gatherers: The Original Libertarians

Abstract
Hunter-gatherer societies can shed light on one of the most fundamental issues bearing on political economy—whether man is better adapted to individualism or to collectivism. The evidence suggests that for millennia before the agricultural revolution, man lived in a state of political autonomy and economic freedom and acted basically as a self-interested individualist, not as the altruist depicted in much of the socialist literature.

Read the article here. 

UPDATE:  This link will work...
http://www.independent.org/pdf/tir/tir_16_04_01_mayor.pdf