" The Pima are among the best-studied indigenous populations in the world. Their history, told by missionaries, soldiers, physicians, and travelers through the Pima territory prior to the twentieth century, is of an affluent and apparently healthy population whose prosperity came to an end in the 1860s. Anglos and Mexican Americans moved into the region, overhunted the local game, and diverted for their own use the Gila River water, on which the Pima depended for fishing and irrigating their crops. "

― Gary Taubes , The Case Against Sugar