Not trying to be funny, either, but how could an isolated population, of a severely remote/xenophobic island, not just disappear due to the side effects of inbreeding? Do secluded populations eventually become immune to the mutations?
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The inhabitants of North Sentinel island are not *entirely isolated*. They regularly engage with other tribes on nearby islands, including for events like marriage.
As such, there is no risk of inbreeding, since there is a large enough population between the tribes to be sustainable. The difference between the Sentinelese and these other tribes is that the Sentinelese have decided not to engage with people outside their “knowns”, a decision accepted by the government of India.
They are, shut off from people not belonging to the tribes the Sentinelese have always known.
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