Watch 'A Boy And His Dog:
https://www.youtube.com/watch?v=5BDxqhI9qDw
Read 'Lord Of The Flies'
Or watch the flick if you don't have the attention span to read a book:
https://www.youtube.com/watch?v=IMBoYBapi8g
And check out why Pitcairn is no longer inhabited.
https://www.google.com/search?q=why+was+everyone+taken+off+of+pit+cairn&oq=why+was+everyone+taken+off+of+pit+cairn&aqs=chrome..69i57j33l2.9695j0j7&sourceid=chrome&ie=UTF-8
Tristan da Cunha might be OK socially, but everyone is an inbred mess.
WHY DID I POST THIS? BECAUSE OF THIS:
https://www.businessinsider.com/billionaire-bunkers-shelter-wealthy-during-apocalypse-2019-6#xpoint-comes-with-its-own-electrical-and-water-systems-so-residents-can-survive-for-at-least-a-year-without-having-to-go-outside-20