In the article above the author claims that we should leave them alone to protect their way of life and their land. She says just because they are not as advanced in technology does not mean they aren't civilized.
I think it's obvious we shouldn't take their land from them or make them do anything they don't want to do but it seems arrogant to say that we can't share our knowledge or technology with them as it would destroy their way of life. If we believe them to be just as civilized as us then we shouldn't stay away from them because we don't think they can handle our advancements.
As long as we do not encroach on their land or force anything on them, I think we should approach them and share with them what we know and let them decide what to do.
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Leave them alone, they are a research goldmine. Having those completely isolated tribes also means completely isolated DNA that can be used to pinpoint human evolution and migration, not only has their DNA been frozen in time, but their culture has as well.