Andrews, Tracy. 1985. ?Descent, Land Use And Inheritance: Navajo Land Tenure Patterns In Canyon De Chelly And Canyon Del Muerto?. Anthropology. Anthropology. University of Arizona. Thedevelopmentofandchangesinhumansocialorganizationhavebeenaconcernofanthropologicalresearchsincetheinceptionofthediscipline.Aperspectivethatfocusesontheinteractionbetweenexogenous(ecologicalandhistorical)variablesandso.