The ancient Maya of the southern Yucatan peninsula remain a mystery to many scholars attempting to explain early complex societies. Their dispersed settlement patterns and land-use techniques suggest a decentralized and less coordinated use of resources than is seen in other regions. Yet the Maya managed a complex political economy based on structured landscaping, and over several generations they significantly altered their environment. In recent years the Three Rivers region of Belize and Guatemala has been the site of some of the most intensive archaeological research in the Maya...