New Zealand is an island nation situated in the southwestern Pacific Ocean, comprising two main landmasses - the North Island (Te Ika-a-Māui) and the South Island (Te Waipounamu) - along with numerous smaller islands such as Stewart Island and the Chatham Islands. It is located approximately 1,500 kilometers east of Australia across the Tasman Sea. Geologically, the country sits astride the boundary of the Pacific and Australian tectonic plates, a position that has created a highly varied and dynamic landscape. This includes the high peaks of the Southern Alps, formed by tectonic uplift, and the volcanic plateau of the North Island. The country is part of a larger, mostly submerged continent known as Zealandia, which separated from the supercontinent Gondwana roughly 80 million years ago.

The political system of New Zealand is a constitutional monarchy with a unicameral parliamentary democracy. The British monarch serves as the ceremonial head of state, represented locally by a Governor-General. Executive power is exercised by the Prime Minister and the Cabinet, who are drawn from the elected House of Representatives. New Zealand is notable for its use of the Mixed Member Proportional (MMP) voting system, introduced in 1996, which typically requires parties to form coalitions or confidence-and-supply agreements to govern. The country lacks a single written constitutional document, relying instead on a collection of statutes, court decisions, and customary conventions, including the Constitution Act 1986 and the Treaty of Waitangi.

The Treaty of Waitangi (Te Tiriti o Waitangi), signed in 1840 between representatives of the British Crown and various Māori chiefs, is considered the founding document of modern New Zealand. It established a British Governor in New Zealand, recognized Māori ownership of their lands and other properties, and gave Māori the rights of British subjects. However, discrepancies between the English and Māori language versions led to decades of conflict and land confiscation. In 1975, the Waitangi Tribunal was established as a permanent commission of inquiry to investigate breaches of the Treaty. Today, the Treaty remains central to the legal and political relationship between the government and the indigenous Māori population, influencing policy across all sectors of the state.