Aerial footage of uncontacted Amazon tribe
Given loggers, or just the general expansion of modern civilizations, they will run into the outside world.  Wouldn't it be better if they were given a gentle introduction?  Send in some speakers and voice/video feeds.  Eventually send in people.  If they want to be left alone afterwards, it's their choice.  If some people want to explore the outer society, let them.<p>If you look at say, Malaysia, the Iban have done pretty well in Sarawak--contact doesn't have to result in the destruction of the natives...