Polynesians first settled Easter Island, also known as Rapa Nui, about 900 years ago, and it is well known for its enormous stone heads.
Jared Diamond and others argue the island is an example of societal collapse due to resource exploitation, leading to ecological and cultural ruin.
Some researchers propose that Rapa Nui had a sustainable system with a stable population until European contact disrupted it.
New studies using remote-sensing and machine learning suggest the island's population was much smaller than previously thought, around 4,000 people.
The islanders used rock gardens to enhance soil productivity, but these could only support a limited number of people.
While some experts challenge the new methods, the research supports the idea that a pre-colonial collapse did not occur and the major population decline happened post-contact, likely due to diseases.
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