Many of these Brazilian tribes have had some contact with loggers/miners/etc, just no formal government contact. Perhaps more interesting is the case of the Se

Many of these Brazilian tribes have had some contact with loggers/miners/etc, just no formal government contact. Perhaps more interesting is the case of the Sentinelese, who live on islands in the bay of bengal, and may have had literally no spoken contact with outsiders in hundreds of years: https://en.wikipedia.org/wiki/Sentinelese_people https://en.wikipedia.org/wiki/Sentinelese_people