This is empty sensationalism. It’s extremely unlikely there are any tribes whose existence is totally unknown to anyone else.
Peoples who have no peaceful contact with anyone in the mainstream or dominant society. There are about 100 uncontacted tribes in the world.
No. Everyone has neighbours, even when they’re some distance away, and they’ll know who they are. If it’s another tribe, perhaps also uncontacted, they may or may not have friendly relations with them.
In some cases, probably. Some may have been in touch with the colonist society in the past, even in past centuries, and then retreated from the violence which that brought. Some may once have been part of larger tribal groups, and split off and moved away, fleeing contact.
Some who now grow no crops, but rely purely on gathering wild foods, may have had vegetable gardens in the past. They may have stopped cultivating because of the need to flee the encroaching society.
No one is. Some Amazonian groups even had guns, from intertribal trading, before they’d ever met a non-Indian. Most uncontacted tribes have used some metal tools, which they have found, stolen or traded with their neighbours, for many years or even generations. Uncontacted peoples in the Andaman Islands use bits of metal from old shipwrecks, and so forth. Sweet potato, the staple for some Polynesian tribes well before their contact with Europeans, in fact came from South America.
All peoples are changing all the time and always have, including uncontacted tribes. Survival doesn’t talk about ‘pristine’ tribes or cultures. They are not backward or ‘Stone Age’, they just live differently.
Generally, tribal peoples have lived on their lands for many generations if not millennia.
Some ‘first contacts’ are acts for the benefit of tourists etc, but there are actually quite a lot of real uncontacted tribes. Sometimes, they are surprisingly close to people who’ve been in contact for decades, or longer.
No one should go to tribes which aren’t in regular contact with outsiders. It’s dangerous for everyone. We only publicize their rough location when it’s needed to protect their lands.
Those leading such expeditions ended up regretting them. They believed that contact was necessary to save the Indians, but the tribe often ended up destroyed anyway. Enlightened thinking now is that the Indians must be left alone, and effort put into protecting them and their lands.
This is sometimes necessary to check whether they’ve moved elsewhere, and whether their lands are being invaded. It can be important to draw attention to their existence, and even to prove it. It’s necessary when the focus is on saving them from destruction, but shouldn’t be done just for tourism.
As already stated, uncontacted tribes will have seen aeroplanes on numerous occasions. The idea that this damages their self-image and/or spiritual beliefs belongs in the realm of fiction, and is based on the false supposition that their cultures are fragile. Experience shows that such peoples are in fact robust and well able to adapt to outside goods – most have been doing so for a very long time. Tribal peoples are not destroyed when they get or see things from outside, but by violence and disease as their lands are invaded.
They hide or show hostility. They make it clear they want to be left alone.
They won’t get the chance. In reality, the future offered by the settler society is to ‘join’ at the lowest possible level – often as beggars and prostitutes. History proves that tribal peoples end up in a far worse state after contact, often dead.
They leave signs such as crossed arrows on hunting trails, or shoot arrows at neighbouring tribes and outsiders who encroach on their land. Some abandon their homes if outsiders come too near and retreat further into the forest. Almost all are well aware of the "wider" world and through historical memory many will know of the dangers of contact.
We know from recently contacted groups that uncontacted tribes have unrivalled knowledge of their environment and medicinal plants which they use to treat diseases known to them.
If a group initiates contact and falls ill from "western" diseases unknown to them, and against which they have no immunity, they should of course be treated immediately by expert medical teams.
Outsiders want their land or its resources, for timber, mining, dam or road building, ranching, or settlement etc. Contact is usually violent and hostile, but the main killers are often common diseases (influenza, measles, etc.) to which the uncontacted people have no immunity and which often prove fatal.
The same as all tribal peoples. Their land rights are enshrined in international law and in many national constitutions. Countries such as Brazil and Peru recognize they have the right to decide themselves whether they wish to make contact or not, in their own time and manner.
Their lands to be protected.
The cost of protecting the world's uncontacted tribes is a fraction of the national budget of the countries where they live. Effective land protection programs can be carried out with only a small percentage of the profits governments earn from mining, oil, gas and logging companies in the Amazon.
If the alternative is their destruction, why not? Whose choice should it be, theirs or ‘ours’? If a people chooses to make contact with wider society, they’ll find a way. If we think they’re human beings, then they have human rights. The problem is that the belief that they are primitive and incapable of deciding for themselves is still widespread.
There is no evidence that uncontacted tribes, including small groups, are not viable. They have survived for generations and if their lands are protected they flourish and live well. Aerial photos taken in Brazil show healthy people with gardens full of fruit and vegetables.
Contact is dangerous and devastating. Some tribes have lost 90% of their population within a year or two of first contact and never recovered, and others have been wiped out altogether. If some do survive and eventually recover, it's at a very high and unacceptable price, often with the loss of most of their population. Even with medical teams on hand at first contact there is no guarantee that indigenous people will respond to treatment or even that they will accept it.
There is no such thing as a "controlled" contact. All past contacts have been highly risky and unpredictable. The policy of "no forced contact" has effectively protected uncontacted peoples in the last two decades. In fact, estimates of the number of uncontacted tribes in Brazil are increasing.
Uncontacted peoples’ evident choice to remain uncontacted must be respected. They should be given time and space to make contact or not. If they decide, as some groups have, that they wish to make contact, that choice too should be respected.
Firstly, although small in number they are the most vulnerable peoples on the planet. If we care about human rights at all, we should surely care about the most endangered.
Secondly, their languages, knowledge of the plants and animals in their environment (including medicinal plants) and view of life are unique. They know things we don’t.
Thirdly, as the ‘most different’, they add enormously to the diversity of human life. If diversity in any sphere is important, this must be amongst the most valuable.
It’s asserting peoples’ right to decide for themselves, rather than be destroyed at the hands of an invading society. No one thinks it’s ‘romantic’ to oppose colonialism, slavery, or apartheid etc.