Aboriginal and Torres Strait Islander peoples have lived on the continent and islands for tens of thousands of years, with hundreds of nations, languages and local systems of law and knowledge. Archaeological dates indicate very early habitation, although migration routes and precise chronology remain subjects of research. Relationships with Country encompass land, water, kinship and responsibility; this knowledge and history are specific to communities and do not form one uniform culture.
Makassan fishers maintained contact and trade with northern coastal communities before British colonisation. British settlement from 1788 relied on the legal fiction of terra nullius and brought dispossession, epidemics, frontier violence and penal transportation. Gold rushes and colonial expansion accelerated migration and the formation of colonies; the state did not recognise Indigenous sovereignty, and First Nations communities continued to resist and adapt.
The federation of 1901 united six British colonies, while restrictive immigration policies and assimilation programmes affected Indigenous families and migrants. Immigration changed the country after the Second World War; the 1992 Mabo decision rejected terra nullius as a basis of Australian law and recognised native title under certain conditions. Recognition, land rights and the effects of the Stolen Generations policies remain central. Australia is now an urban, multicultural state with First Nations communities and diaspora.