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Resource Variability, Risk, and the Structure of Social Networks: An Example from the Prehistoric Southwest

Social interactions within a region may reduce the risk of resource stress by facilitating access to resources in other areas. Archaeological implications of this view of social networks are considered for the part-agricultural inhabitants of central New Mexico during the Pithouse period (ca. A.D. 900—1250). Spatial patterning of climatic variables suggests that social networks at least 50 km in extent and oriented in an east-southeastern direction from the focal site toward the Sierra Blanca region could have provided access to extralocal resources during years of poor local productivity. Similarity of ceramic assemblages (measured by Brainerd—Robinson coefficients) between the focal site and sites in the proposed alternative resource area confirms some degree of social contact during the Pithouse period; dissimilar ceramic assemblages from comparably distant sites to the west (in the Socorro area) indicate that geographic distance alone is not a good predictor of social interactions in this region.