Terra nullius—Latin for 'land belonging to no one'—was a legal doctrine used by European colonial powers to claim that lands inhabited by Indigenous peoples were legally unoccupied and therefore available for seizure. Applied most infamously in Australia, where British colonisation began in 1788, the concept denied Indigenous sovereignty and land rights for over two centuries. It was not until the landmark 1992 High Court decision in Mabo v Queensland (No 2) that terra nullius was formally rejected in Australian law.
What Is Terra Nullius and Where Did the Doctrine Come From?
The legal concept grew out of European international law in the 16th and 17th centuries, drawing on Roman property law and the writings of jurists such as Emer de Vattel, whose 1758 work The Law of Nations argued that nomadic peoples who did not cultivate land held no legal title to it. Colonial powers including Britain, France, Spain, and the Netherlands used this reasoning to justify occupation of territories from the Americas to Africa to the Pacific. The doctrine rested on a fundamentally Eurocentric definition of ownership: only those who farmed, built permanent settlements, or held formal legal title were considered to possess land. Indigenous peoples whose relationship with land was communal, spiritual, or nomadic were rendered legally invisible.
How Was Terra Nullius Applied in Australia?
When the British First Fleet arrived at Botany Bay on 26 January 1788, Governor Arthur Phillip claimed the continent for the Crown under the assumption of terra nullius. Australia's estimated 300,000 to 750,000 Aboriginal and Torres Strait Islander inhabitants—comprising hundreds of distinct nations with sophisticated land management systems—were legally erased. Unlike in New Zealand, where the Treaty of Waitangi (1840) at least nominally acknowledged Maori sovereignty, no treaty was ever signed with Australia's First Nations peoples. The doctrine underpinned every subsequent land grant, pastoral lease, and colonial expansion, fuelling frontier violence and the forced removal of Indigenous Australians from their ancestral territories throughout the 19th and early 20th centuries.
| Year | Event | Significance |
|---|---|---|
| 1758 | Vattel publishes The Law of Nations | Provides legal framework for terra nullius claims |
| 1788 | British colonisation of Australia begins | Terra nullius applied to entire continent |
| 1840 | Treaty of Waitangi, New Zealand | Contrasting approach: Maori sovereignty partly recognised |
| 1971 | Milirrpum v Nabalco (Gove Land Rights case) | Australian court upholds terra nullius, denying Aboriginal title |
| 1992 | Mabo v Queensland (No 2) | High Court overturns terra nullius; native title recognised |
| 1993 | Native Title Act passed | Federal legislation formalises post-Mabo native title framework |
How Did the Mabo Case Overturn Terra Nullius?
Eddie Mabo, a Meriam man from Murray Island in the Torres Strait, launched legal action in 1982 arguing that his people had continuously occupied and owned their land long before British annexation. After a decade of litigation, the High Court of Australia ruled 6 to 1 on 3 June 1992 that terra nullius had been wrongly applied and that native title could survive colonisation where connection to the land had been maintained. Justice Gerard Brennan, writing the leading judgment, described the terra nullius fiction as a convenient falsehood. The ruling was historic, but native title has proven difficult to claim in practice: applicants must demonstrate continuous connection to land, a burden that dispossession itself often makes impossible to meet.
