Moriori were the original inhabitants of Rēkohu, Rangihaute, Hokorereoro, and the other nearby islands that make up the Chatham Islands group, arriving some time after 1,000 CE. Moriori developed a unique culture on the islands, where there was little differentiation of rank, and warfare and killing were outlawed. It wasn't until 1790 that there's a record of European bringing the islands into sight, when Lieutenant William Broughton, the commander of the armed tender Chatham, on 29 November 1790, sighted the islands. 