This story first appeared in the August 2003 issue of National Geographic magazine.
This content is Subscriber-Exclusive
You must have a National Geographic subscription to explore this article.
Deep in the jungles of Brazil, Indian rights advocate Sydney Possuelo raced to save people he hoped never to meet: the uncontacted Flecheiros.
Leading expeditions with missionary zeal, Sydney Possuelo, right center, is driven by a gospel of his own: "I don't need to know what language the Flecheiros speak or what gods they worship. I just want to protect them."