Roughly, the Moriori were an isolated group of Polynesians, who ended up on an island with no timber and little workable stone. They lived peacefully, and peacefully treated with the Maori who visited them, even as the number of Maori trading with them and living on the island increased. The Maori eventually killed and enslaved them all.
You may be interested in the Maori and the Moriori.
https://en.wikipedia.org/wiki/Moriori
Roughly, the Moriori were an isolated group of Polynesians, who ended up on an island with no timber and little workable stone. They lived peacefully, and peacefully treated with the Maori who visited them, even as the number of Maori trading with them and living on the island increased. The Maori eventually killed and enslaved them all.