Conflict in the Modern Teotihuacan Irrigation System

Abstract
In recent years a number of investigators have been concerned with the antiquity of irrigation agriculture in central Mexico and its possible relationship to processes of social and political differentiation in the ancient urban civilizations of that region. Because of its strategic role in the prehistory of Middle America, attention has centered on the Basin of Mexico in the Mexican central plateau. The semi-arid Valley of Teotihuacan, in the northwestern part of the Basin, has been of special concern because it was the locus of the enormous city of Teotihuacan, one of the most powerful and influential centers in Middle America during a large part of the first millenium of the Christian era. Studies to date have dealt largely with historical and archaeological evidence bearing on this problem.