This past month, I've been staying close to the Gila river, a mostly un-dammed river, located in southern New Mexico. According to Wikipedia: 'Indigenous peoples have lived along the river for at least 2,000 years, establishing complex agricultural societies before European exploration of the region began in the 16th century.' (Gila, below) The river was the center of life, and was inhabited by the Pima, Hohokam.