The first inhabitants of Australia were Aboriginal people who migrated 40,000 years ago. European settlement began in 1788 and immigration has been important to Australia's development since. During the 1850s gold rush, Aboriginal people were displaced from their tribal lands as new settlers arrived. Australia is comprised of 6 states: New South Wales, Tasmania, Western Australia, South Australia, Victoria and Queensland. It has a population of 22.8 million people and its capital is Canberra.