Island nations are a long way from being screwed.
All of these Pacific nations were in existence for long before white people came to the pacific.
They survived without fossil fuels, electricity, telephones and the internet, hospitals and medical centres, TV, Macdonalds, and the only transport they had was their feet or canoes.
their homes were thatched by coconut branches, and could be erected within a day.
Everything they consumed came from their islands, nothing imported except for the occasional barter with passing sea craft.
Their protein came mainly from caught fish as they needed them, harvested yams as they were required, had seasonal supplies of fruits nuts and berries.
They would still have the knowledge to go back to that subsistence living should they have to.
Western nations on the other hand would be screwed.
So many western society members lack the resilience to be able to even build a rudimentary shelter, much less be able to live of the land.
Mick