The Moriori are the indigenous people (Tchakat Henu) of the Chatham Islands. Because of their harsh and isolated environment, in which agriculture was not possible, the Moriori developed a culture-based on hunting and gathering. Their society was egalitarian and peaceful, traits that are rare in most Polynesian cultures. Lethal violence was subject to a religious prohibition, and rarely or never occurred. In 1835 the Chatham Islands were conquered by Māori from mainland New Zealand. As a result of their harsh treatment at the hands of the invaders, the Moriori suffered catastrophic demographic and cultural decline. Today, around 1000 New Zealanders claim Moriori descent, but little remains of Moriori culture.