Easter Island people... the narrative may be wrong

[Maxmars]

Well, one 'theory' has it that they ran out of food and turned to cannibalism, and their habit of snacking on their neighbors exceeded the birth rate, so they ate themselves into extinction...

I can't help but wonder about the 'given' notions of this society having 'destroyed themselves through their own behavior.'  It seems unlikely after generations of successfully being there, they would have just stopped doing what worked for hundreds of years.  Something either changed in their environment abruptly, or perhaps the Europeans only got half the story.