The human history of New Zealand can be dated back to between 1320 and 1350 CE, when the main settlement period started, after it was discovered and settled by Polynesians, who developed a distinct MÄori culture. Like other Pacific cultures, MÄori society was centred on kinship links and connection with the land but, unlike them, it was adapted to a cool, temperate environment rather than a warm, tropical one. The first European explorer known to have visited New Zealand was the Dutch navigator Abel Tasman, on 13 December 1642. In 1643 he charted the west coast of the North Island, his expedition then sailed back to Batavia without setting foot on New Zealand soil. British explorer James Cook, who reached New Zealand in October 1769 on the first of his three voyages, was the first European to circumnavigate and map New Zealand. From the late 18th century, the country was regularly visited by explorers and other sailors, missionaries, traders and adventurers. The period from Polynesian settlement to Cook's arrival is New Zealand's prehistoric period, a time before written records began. Acknowledgement of indigenous oral history as recorded history is a matter of academic debate. Depending on definitions, the period from 1642 to 1769 can be called New Zealand's protohistory rather than prehistory: Tasman's recording of MÄori was isolated and scant.
On 6 February 1840, the Treaty of Waitangi was signed between representatives of the United Kingdom and various MÄori chiefs, initially at Waitangi and over the following weeks at other locations across the country. On 21 May 1840, New Zealand entered the British Empire when Lieutenant-Governor William Hobson proclaimed British sovereignty at KororÄreka (Russell). Disputes over the differing versions of the Treaty and settler desire to acquire land from MÄori led to the New Zealand Wars from 1843. There was extensive British settlement throughout the rest of the 19th century and into the early part of the next century. The effects of European infectious diseases, the New Zealand Wars, and the imposition of a European economic and legal system led to most of New Zealand's land passing from MÄori to PÄkehÄ (European) ownership, and MÄori became impoverished.