Two years before this story begins, the Liawep were living deep in the jungle of Papua, New Guinea, long forgotten by the outside world. Numbering seventy-nine men, women, and children, the tribe worshipped a mountain, dressed in leaves, and hid when planes flew overhead, believing them to be evil sanguma birds. Their discovery by a missionary hit the headlines in 1993. Galvanized by the reports of people living in Stone Age conditions, Edward Marriott...