Aboriginal settlers from Southeast Asia have been living in the continent long before the first Europeans began exploration in the 17th century. No formal territorial claims were made until 1770, when Capt. James COOK took possession in the name of Great Britain. Six colonies were created in the late 18^th and 19^th centuries; they federated and became the Commonwealth of Australia in 1901.

The new country took advantage of its natural resources to rapidly develop its agricultural and manufacturing industries and to make a major contribution to the British effort in World Wars I and II. In recent decades, Australia has transformed itself into an internationally competitive, advanced market economy. Long-term concerns include pollution, particularly depletion of the ozone layer, and management and conservation of coastal areas, especially the Great Barrier Reef. A referendum to change Australia's status, from a commonwealth headed by the British monarch to a republic, was defeated in 1999.