Over one hundred tribes around the world choose to reject contact with outsiders. They are the most vulnerable peoples on the planet.
Brazil's uncontacted tribes are being devastated by disease, but there is hope.
On India's remote Andaman Islands, the world's most isolated tribe has lived alone for 60,000 years.
Peru's uncontacted tribes are facing the gravest threat in their history as loggers and oil companies encroach.
In a small patch of rainforest in Brazil, the last six survivors of a genocide dance.
