There are few questions more central to understanding the prehistory of our species than those regarding the institutionalization of social inequality. Social inequality is manifested in unequal access to goods, information, decision-making, and power. This structure is essential to higher orders of social organization and basic to the operation of more complex societies. An understanding of the transformation from relatively egalitarian societies to a hierarchical organization and socioeconomic stratification is fundamental to our knowledge about the human condition. In a follow-up to their...