If you came upon an island that had lots more stonework than you thought the current population could produce, and there were all these obsidian spearheads discarded everywhere, and the population continued to be in decline — you might very well come up with a theory about warfare, ecological collapse, and disaster.
Or you might just be wrong in your premises.
New evidence: Easter Island civilization was not destroyed by war | Ars Technica
Researchers debunk a longstanding myth using elliptical Fourier analysis on ancient tools.
Nae, not war, used up every resource making those bloody heads.
Not so surprising that European visitors introduced disease.
Very very interesting story thank you.
Motivated reasoning never fails to deliver.