1840 agreement between the British Crown and Māori leaders in New Zealand
The Treaty of Waitangi (), sometimes referred to as Te Tiriti, is a document of central importance to the history of New Zealand, its constitution, and its national mythos. It has played a major role in the treatment of the Māori people in New Zealand by successive governments and the wider population, something that has been especially prominent from the late 20th century. The treaty document is an agreement, not a treaty as recognised in international law. It was first signed on 6 February 1840 by Captain William Hobson as consul for the British Crown and by Māori chiefs () from the North Island of New Zealand. The treaty's quasi-legal status satisfies the demands of biculturalism in contemporary New Zealand society. In general terms, it is interpreted today as having established a partnership between equals in a way the Crown likely did not intend it to in 1840. Specifically, the treaty is seen, first, as entitling Māori to enjoyment of land and of natural resources and, if that right were ever breached, to restitution. Second, the treaty's quasi-legal status has clouded the question of whether Māori had ceded sovereignty to the Crown in 1840, and if so, whether such sovereignty remains intact.
The treaty was written at a time when the New Zealand Company, acting on behalf of large numbers of settlers and would-be settlers, was establishing a colony in New Zealand, and when some Māori leaders had petitioned the British for protection against French ambitions. It was drafted with the intention of establishing a British Governor of New Zealand, recognising Māori ownership of their lands, forests and other possessions, and giving Māori the rights of British subjects. It was intended by the British Crown to ensure that when Lieutenant Governor Hobson subsequently made the declaration of British sovereignty over New Zealand in May 1840, the Māori people would not feel that their rights had been ignored. Once it had been written and translated, it was first signed by Northern Māori leaders at Waitangi. Copies were subsequently taken around New Zealand and over the following months many other chiefs signed. Around 530 to 540 Māori, at least 13 of them women, signed the Māori language version of the Treaty of Waitangi, despite some Māori leaders cautioning against it. Only 39 signed the English version. An immediate result of the treaty was that Queen Victoria's government gained the sole right to purchase land. In total there are nine signed copies of the Treaty of Waitangi, including the sheet signed on 6 February 1840 at Waitangi.
The text of the treaty includes a preamble and three articles. It is bilingual, with the Māori text translated in the context of the time from the English.
As some words in the English treaty did not translate directly into the written Māori language of the time, the Māori text is not an exact translation of the English text, particularly in relation to the meaning of having and ceding sovereignty. These differences created disagreements in the decades following the signing, eventually contributing to the New Zealand Wars of 1845 to 1872 and continuing through to the Treaty of Waitangi settlements starting in the early 1990s.
During the second half of the 19th century Māori generally lost control of much of the land they had owned, sometimes through legitimate sale, but often by way of unfair deals, settlers occupying land that had not been sold, or through outright confiscations in the aftermath of the New Zealand Wars. In the period following the New Zealand Wars, the New Zealand government mostly ignored the treaty, and a court judgement in 1877 declared it to be "a simple nullity". Beginning in the 1950s, Māori increasingly sought to use the treaty as a platform for claiming additional rights to sovereignty and to reclaim lost land, and governments in the 1960s and 1970s responded to these arguments, giving the treaty an increasingly central role in the interpretation of land rights and relations between Māori people and the state. 
In 1975 the New Zealand Parliament passed the Treaty of Waitangi Act, establishing the Waitangi Tribunal as a permanent commission of inquiry tasked with interpreting the treaty, investigating breaches of the Principles of the Treaty of Waitangi by the Crown or its agents, and suggesting means of redress. In most cases, recommendations of the tribunal are not binding on the Crown, but settlements with a total value of roughly $1 billion have been awarded to various Māori groups. Various legislation passed in the latter part of the 20th century has made reference to the treaty, which has led to ad hoc incorporation of the treaty into law. Increasingly, the treaty is recognised as a founding document in New Zealand's developing unwritten constitution.
The New Zealand Day Act 1973 established Waitangi Day as a national holiday to commemorate the signing of the treaty.
Context and background history.
Treaty making by European powers with indigenous peoples had always been common but not universal practice in empire building. Treaties were dependent on the specific situation. In 19th century New Zealand, the British wanted to formalise their involvement in the country, regulate land speculation and control general disorder. They were faced with a Māori population that was more numerous, with cultivated land and government. Therefore, the British drew up the Treaty of Waitangi. In comparison, this situation did not apply in Australia where no treaties were deemed necessary by the British.
Māori generally respected the British, partially due to their relationships with missionaries and also due to Britain's status as a major maritime power, which had been made apparent to Māori travelling outside New Zealand. 
While heading the parliamentary campaign against the British slave trade for twenty years, leading to slave trading being prohibited in the British Empire in 1807, William Wilberforce, with other members of the Clapham Sect, championed the foundation of the Anglican Church Missionary Society (CMS) in 1799, with the determination to improve the treatment of indigenous people by the British. This led to the establishment of the Christian mission in New Zealand, which saw laymen arriving from 1814 to teach building, farming and Christianity to Māori, as well as training Māori ministers. 
The Māori language did not then have an indigenous writing system. Missionaries learned to speak Māori, introduced the Latin alphabet and, with Māori, developed the written form of the language between 1817 and 1830. In 1833, while living in the Paihia mission-house of the head of the New Zealand CMS, Rev Henry Williams, missioner William Colenso published Māori translations including parts of books of the Bible, the first books printed in New Zealand. Demand for Colenso's 1837 Māori New Testament, and for the Prayer Book that followed, grew exponentially, as did Christian Māori leadership and public Christian services, with 33,000 Māori soon attending regularly. Literacy and understanding the Bible increased and social and economic benefits.
Other major players in the area around the 1830s included American whalers and French Catholics who came for trade and as missionaries. The Māori were deeply distrustful of the French, due to a massacre of 250 people that had occurred in 1772, when the French retaliated for the killing of Marion du Fresne and some of his crew. 
While the threat of general French colonisation never materialised, in 1831 it prompted thirteen major chiefs from the far north of the country to meet at Kerikeri to compose a letter to King William IV asking for Britain to be a "friend and guardian" of New Zealand. It is the first known plea for British intervention written by Māori. In response, the British government sent James Busby in 1832 to serve as the British Resident in New Zealand. In 1834 Busby drafted a document known as the (in the Māori language) and the Declaration of the Independence of New Zealand (in English) which he and 35 northern Māori chiefs signed in 1835, establishing those chiefs as representatives under the title of the "United Tribes of New Zealand". He Whakaputanga (Declaration of the Independence of New Zealand) asserted that the 'public authority' of New Zealand remained with Māori. This document was not well received by the Colonial Office in Britain, and it was decided in London that a new policy for New Zealand was needed. From a Māori perspective, The Declaration of Independence had a twofold significance: first, for the British to establish control of its lawless subjects in New Zealand; and second, to establish internationally the mana and sovereignty of Māori leaders.
From May to July 1836, Royal Navy officer Captain William Hobson, under instruction from Governor of New South Wales Sir Richard Bourke, visited New Zealand to investigate claims of lawlessness in its settlements. Hobson recommended in his report that British sovereignty be established over New Zealand, in small pockets similar to those of the Hudson's Bay Company in Rupert's Land (in present-day Canada). Hobson's report was forwarded to the Colonial Office. From April to May 1838, the House of Lords held a select committee into the "State of the Islands of New Zealand". The New Zealand Association (later the New Zealand Company), missionaries, Joel Samuel Polack, and the Royal Navy made submissions to the committee.
On 15 June 1839, new letters patent were issued in London to expand the territory of New South Wales to include the entire territory of New Zealand, from latitude 34° South to 47° 10' South, and from longitude 166° 5' East to 179° East. Governor of New South Wales George Gipps was appointed Governor over New Zealand. This was the first clear expression of British intent to annex New Zealand.
Hobson was called to the Colonial Office on the evening of 14 August 1839 and given instructions to take the constitutional steps needed to establish a British colony. He was appointed Consul to New Zealand and was instructed to negotiate a voluntary transfer of sovereignty from the Māori to the British Crown – as the House of Lords select committee had recommended in 1837. The Secretary of State for War and the Colonies, the Marquess of Normanby, gave Hobson three instructions: to gain freely given Māori recognition of British sovereignty over all or part of New Zealand, to assume complete control over land matters, and to establish a form of civil government. The Colonial Office did not provide a draft of the treaty. Normanby wrote at length about the need for British intervention as essential to protect Māori interests, but this was somewhat deceptive. Hobson's instructions gave no provision for Māori government of any kind nor any Māori involvement in the administrative structure of the prospective new colony. His instructions required him to:
treat with the Aborigines of New Zealand for the recognition of Her Majesty's Sovereign authority over the whole or any part of those islands which they may be willing to place under Her Majesty's dominion.
The historian, Claudia Orange, argues that prior to 1839 the Colonial Office had initially planned a "Māori New Zealand" in which European settlers would be accommodated (without a full colony), where Māori might retain ownership and authority over much of the land and cede some land to European settlers as part of a colony governed by the Crown. Normanby's instructions in 1839 show that the Colonial Office had shifted their stance toward colonisation and "a settler New Zealand in which a place had to be kept for Māori", primarily due to pressure from increasing numbers of British colonists, and the prospect of a private enterprise in the form of the New Zealand Company colonising New Zealand outside of the British Crown's jurisdiction. The Colonial Office was forced to accelerate its plans because of both the New Zealand Company's hurried dispatch of the "Tory" to New Zealand on 12 May 1839 to purchase land, and plans by French Captain Jean François L'Anglois to establish a French colony in Akaroa. After examining Colonial Office documents and correspondence (both private and public) of those who developed the policies that led to the development of the treaty, historian Paul Moon similarly argues that the treaty was not envisioned with deliberate intent to assert sovereignty over Māori, but that the Crown originally only intended to apply rule over British subjects living in the fledgling colony, and these rights were later expanded by subsequent governors through perceived necessity.
Hobson left London on