Settler colonialism is a distinctive form of colonization in which the colonizers come to stay — to displace or exterminate the indigenous population and replace it, building a new society on the cleared ground. It is not the same as extractive colonialism (Congo, Indonesia), which mines wealth through a thin administrative layer, nor administrative colonialism (India, Vietnam), which rules a native majority that remains in place. It is the form of European expansion that produced the United States, Canada, Australia, New Zealand, Argentina, Chile, the Boer republics and British settlement in southern Africa, and the French presence in Algeria — societies where the settlers became the demographic majority and where, for that reason, the indigenous population could not simply outlast the occupier. The political consequences are still being adjudicated in each of those societies, in courts, constitutions, and national memory.
The mechanisms are visible across cases: land seizure legitimated by treaties never honoured (or by terra nullius doctrines that denied indigenous title altogether); demographic replacement through immigration, disease, and violence — in the Americas, introduced smallpox and measles killed perhaps ninety percent of the pre-contact population before most settlers even arrived; cultural elimination through residential schools (Canada's ran into the 1990s), language bans, and forced religious conversion; and the construction of a new national narrative — the frontier, the outback, the veld — that erases or romanticizes the displacement. Patrick Wolfe's formulation — 'invasion is a structure not an event' — captures the durability: the colonization is not a thing that happened, it is a thing that continues to happen in the institutions of the settler state, in land registries and water rights and police forces. The legal frameworks are still being challenged: Mabo (1992) overturned terra nullius in Australia, Calder (1973) forced Canada to recognize aboriginal title, the Waitangi Tribunal has reopened a 19th-century treaty in New Zealand, and U.S. tribal-sovereignty cases keep redrawing the line. What unites them is the logic of elimination: because the settler society cannot leave, the indigenous claim becomes existential rather than merely administrative, which is why these conflicts resist the ordinary toolkit of decolonization.
The contemporary debates about Israel-Palestine, about Indigenous land claims in North America and Australasia, about land reform in post-apartheid South Africa, and about French Algerian memory are all running on the settler-colonial template. Recognizing the structural similarity does not settle the political questions — it can even inflame them — but it clarifies why the same problems keep recurring and why straightforward decolonization solutions (the colonizers go home) are unavailable when the colonizers' descendants have been there for five or ten generations and have nowhere else that is home. The hard cases of the 21st century are mostly the unfinished business of the settler frontier.