It's important to note that all of these
tribes are likely to have come into contact with the world in some manner.
Whether you're talking about planes flying overhead, inter-tribal trading, or
lone missionaries, even the most remote tribes would be aware of the outside
world in some way. According to Fiona Watson, research director for Survival
International in an interview with the BBC, “They know far more about the
outside world than most people think... They are experts at living in the
forest and are well aware of the presence of outsiders.”
Knowledge of these tribes comes from many
sources, including aerial footage, reports from neighbouring tribes, and
infrequent personal encounters. While the outside world has long been
fascinated by people who live outside the reaches of conventional society,
indigenous rights activists want these groups to be left alone in order to
ensure self-determination and protection from modern diseases. Many of these
tribes have only had a handful of encounters with western people, which means
they're likely to lack immunity to everyday diseases such as the common cold.
There are thought to be between 70 and 80
lost tribes in the rainforests of Brazil, most of who have only a few hundred
people or less per tribe. The Javari Valley in Brazil is particularly
important, with this area about the size of Austria and home to 20 indigenous
tribes. Of the 3,000 people estimated to live there, about 2,000 are likely to
be uncontacted. Untouched peoples have also been found in other South American
nations, including Bolivia, Colombia, Paraguay, Peru, and Ecuador. There are
also three known uncontacted tribes living in Venezuela, although again, they
may only account for a few hundred people.
While there are far fewer uncontacted
tribes living outside South America, self-sufficient tribes are known to exist
in New Guinea, the Congo, and islands off the coast of India. West Papua
contains as many as 44 uncontacted tribes, with the mountainous terrain and
evolution of multiple languages in the region helping tribes to stay isolated.
The recent death of an American missionary has brought the Sentinelese people
into global focus, with this isolated group in the Andaman Islands off the
coast of India often called the most secluded tribe in the world. With a
language that's distinct from other Andaman groups, the Sentinelese tribe may
have been isolated for thousands of years. The Jarawas are another Andamanese
tribe who live largely isolated from other peoples.
Image source: Ricard