In 1937 an offi cial from the Mexican forest service visited the rugged Sierra Tarahumara mountains in southern Chihuahua, which even today remain one of the nation’s most isolated places. Th e landscape that greeted An-tonio H. Sosa was unlike anything he had seen in central Mexico. He ad-mired the “immensity, beauty, and potential” of the untouched Ponderosa and Montezuma pines tha…