Oceania

Oceania is a geographic region consisting of Australia, New Zealand, New Guinea, and thousands of islands scattered across the Pacific Ocean. It is the smallest inhabited continent by land area, but vast in terms of ocean: the distance between islands reaches thousands of kilometres.

The boundaries of Oceania are not uniformly agreed upon. Some definitions include only Pacific islands, while others incorporate Australia as a continent. There is also no complete consensus on whether certain island groups such as Hawaii or the Malay Archipelago should be included in the region.

Conventional subdivisions

The region is typically divided into four parts: Australasia (Australia and New Zealand), Melanesia (New Guinea, Solomon Islands, Vanuatu, Fiji, New Caledonia), Micronesia (Kiribati, Marshall Islands, Palau, Nauru, Mariana Islands), and Polynesia (Samoa, Tonga, Tuvalu, Cook Islands, Tahiti, and Hawaii). These divisions are based on history, culture, and geography.

Geography and climate

Islands fall into two main types: high volcanic islands with fertile soil, and low coral atolls with limited freshwater. Much of Australia is arid and semi-arid; New Zealand has a temperate oceanic climate. Rising sea levels and extreme weather events pose particular challenges to atoll nations such as Tuvalu, Kiribati, and the Marshall Islands.

Peoples and history

Australia and New Guinea have been inhabited for more than forty thousand years. Austronesian expansion later reached Micronesia and Polynesia through voyages guided by navigation techniques based on stars, waves, and birds. From the 18th to the 20th centuries, European powers—particularly Britain, France, Germany, and later the United States—colonized much of the region. Most territories gained independence between the 1960s and 1980s, though some, such as French Polynesia and Guam, maintain ongoing political ties with other nations.

Economy and institutions

The economies of Australia and New Zealand rely on mining, agriculture, and services; smaller island nations typically depend on fishing, tourism, foreign aid, and remittances from emigrants. The Pacific Islands Forum is the largest regional political organization, addressing issues of climate, oceans, and security.