How are the small, remote settlements of the world (i.e. upper Greenland, Nunavut, Pitcairn Island, Tristan de Cunha) able to avoid a completely incestuous population?
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At least in the case of Pitcairn, they don’t. Historically there has been a lot of inbreeding. ([https://www.nytimes.com/1936/11/08/archives/pitcairn-refutes-inbreeding-harm-biologists-study-of-island-records.html](https://www.nytimes.com/1936/11/08/archives/pitcairn-refutes-inbreeding-harm-biologists-study-of-island-records.html) / [https://content.time.com/time/subscriber/article/0,33009,883297,00.html](https://content.time.com/time/subscriber/article/0,33009,883297,00.html) etc)
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