Indonesian (Republic Indonesia) is a country in Southeast Asia. Comprising 17,508 islands, it is the world's largest archipelagic state. With a population of 222 million people in 2006, it is the world's fourth most populous country and the most populous Muslim-majority nation, although officially it is not an Islamic state. Indonesia is a republic, with an elected parliament and president. The nation's capital city is Jakarta. The country shares land borders with Papua New Guinea, East Timor and Malaysia. Other neighboring countries include Singapore, the Philippines, Australia, and the Indian territory of the Andaman and Nicobar Islands.
Across its many islands, Indonesia consists of distinct ethnic, linguistic, and religious groups. The Javanese are the largest and most politically dominant ethnic group. As a unitary state and a nation, Indonesia has developed a shared identity defined by a national language, a majority Muslim population, and a history of colonialism and rebellion against it. Indonesia's national motto, "Bhinneka Tunggal Ika" ("Unity in Diversity"), articulates the diversity that shapes the country. Despite its large population and densely populated regions, Indonesia has vast areas of wilderness that support the world's second highest level of biodiversity. The country is richly endowed with natural resources, yet poverty is a defining feature of contemporary Indonesia.
Fossilized remains of Homo erectus, popularly known as the "Java Man", suggest that the Indonesian archipelago was inhabited two million to 500,000 years ago Austronesian people, who form the majority of the modern population, migrated to South East Asia from Taiwan. They arrived in Indonesia around 2000 BCE, and confined the native Melanesian peoples to the far eastern regions as they expanded. Ideal agricultural conditions and the mastering of wet-field rice cultivation as early as the eighth century BCE, allowed villages, towns, and small kingdoms to flourish by the first century CE. Indonesia's strategic sea-lane position fostered inter-island and international trade. The nutmeg plant is native to Indonesia's Banda Islands. Once one of the world's most valuable commodities, it drew the first European colonial powers to Indonesia.
The first Europeans arrived in Indonesia in 1512, when Portuguese traders, led by Francisco Serrão, sought to monopolize the sources of nutmeg, cloves, and cubeb pepper in Maluku. Dutch and British traders followed. In 1602 the Dutch established the Dutch East India Company (VOC) and became the dominant European power. Following bankruptcy, the VOC was formally dissolved in 1800, and the government of the Netherlands established the Dutch East Indies as a nationalized colony. For most of the colonial period, Dutch control over these territories was tenuous; only in the early 20th century did Dutch 
dominance extend to what was to become Indonesia's current boundaries. The Japanese invasion and subsequent occupation during World War II ended Dutch rule, and encouraged the previously suppressed Indonesian independence movement. Two days after the surrender of Japan in August 1945, Sukarno, an influential nationalist leader, declared independence and was appointed president.
Indonesia is the world's 16th-largest country in terms of land area. Its average population density is 134 people per square kilometer (347 per sq mi), 79th in the world, although Java, the world's most populous island, has a population density of 940 people per square kilometer (2,435 per sq mi). Indonesia's seismic and volcanic activity is among the worlds highest. Lying along the equator, Indonesia has a tropical climate, with two distinct monsoonal wet and dry seasons.
Indonesia's 80,000 kilometers (50,000 mi) of coastline are surrounded by tropical seas that contribute to the country's high level of biodiversity. Indonesia has a range of sea and coastal ecosystems, including beaches, sand dunes, estuaries, mangroves, coral reefs, sea grass beds, coastal mudflats, tidal flats, algal beds, and small island ecosystems. Indonesia is second only to Australia in its degree of endemism; with 26% of its 1,531 species of bird and 39% of its 515 species of mammal being endemic/ Forests cover approximately 60% of the country. In Sumatra and Kalimantan, these are predominantly of Asian species. Papua was part of the Australian landmass, and is home to a unique fauna and flora closely related to that of Australia, including over 600 bird species The British naturalist, Alfred Wallace, described a dividing line between the distribution and peace of Indonesia's Asian and Australasian species. Known as the Wallace Line, it runs roughly north-south along the edge of the Sunda Shelf, between Kalimantan and Sulawesi, and along the deep Lombok Strait, between Lombok and Bali.
Indonesia consists of 17,508 islands, about 6,000 of which are inhabited. These are scattered over both sides of the equator. The five largest islands are Java, Sumatra, Kalimantan (the Indonesian part of Borneo), New Guinea (shared with Papua New Guinea), and Sulawesi. Indonesia shares land borders with Malaysia on the islands of Borneo and Sebatik, Papua New Guinea on the island of New Guinea, and East Timor on the island of Timor. Indonesia also shares borders with Singapore, Malaysia, and the Philippines to the north and Australia to the south across narrow straits of water. The capital, Jakarta, is on Java and is the nation's largest city, followed by Surabaya, Bandung, Medan, and Semarang.
