For at least 40,000 years before European settlement in the late 18th century, Australia was inhabited by indigenous Australians,
who belonged to one or more of roughly 250 language groups.
After discovery by Dutch explorers in 1606, Australia's eastern half was claimed by Britain in 1770 and initially settled through penal transportation to the colony of New South Wales, formally founded on 7 February 1788
(although formal possession of the land had occurred on 26 January 1788). The population grew steadily in subsequent decades; the continent was explored and an additional five self-governing Crown Colonies were established.
On 1 January 1901, the six colonies became a federation and the Commonwealth of Australia was formed. Since Federation, Australia has maintained a stable liberal democratic political system and is a Commonwealth realm. The population is 22 million, with approximately 60 per cent concentrated in and around the mainland state capitals of Sydney, Melbourne, Brisbane, Perth and Adelaide. The nation's capital city is Canberra, in the Australian Capital Territory. Approximately 56 per cent of Australia's population live in either Victoria or New South Wales, and approximately 77 per cent live on the mainland's east coast.
Human habitation of Australia is estimated to have begun between 42,000 and 48,000 years ago,
possibly with the migration of people by land bridges and short sea-crossings from what is now Southeast Asia. These first inhabitants may have been ancestors of modern Indigenous Australians. At the time of European settlement in the late 18th century, most Indigenous Australians were hunter-gatherers, with a complex oral culture and spiritual values based on reverence for the land and a belief in the Dreamtime. The Torres Strait Islanders, ethnically Melanesian, were originally horticulturalists and hunter-gatherers
