Kent G. Lightfoot
Prehistoric Political Dynamics: A Case Study from the American Southwest
Dekalb, Ill., NIU Press, 1984.
"Lightfoot offers a model of sociopolitical change that has at its core a feedback cycle that can be intitiated even in very simple societies by an increase in the density of activities and information sources. This selects for a simple information-processing and decision-making hierarchy. Emergence of leadership then fosters population growth, surplus accumulation, subsistence intensification, regional exchange, and competition among leader and settlement; these in turn promote further political development."