The Republic of Indonesia (IPA: /ˌɪndoʊˈniːziːə/, /ˌɪndəˈniːziːə/, /ˌɪndəˈniːʒə/) (Indonesian: Republik 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.

The Indonesian archipelago has been an important trade region since at least the seventh century, when the Srivijaya Kingdom formed trade links with China. Indonesian history has been influenced by foreign powers drawn to its natural resources. Under Indian influence, Hindu and Buddhist kingdoms flourished from the early centuries CE. Muslim traders brought Islam, and European powers fought one another to monopolize trade in the Spice Islands of Maluku during the Age of Discovery. Following three and a half centuries of Dutch colonialism, Indonesia secured its independence after World War II. Indonesia's history has since been turbulent, with challenges posed by natural disasters, corruption, separatism, a democratization process, and periods of rapid economic change.

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" lit. "many, yet one"), articulates the diversity that shapes the country. However, sectarian tensions and separatism have led to violent confrontations that have undermined political and economic stability. 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.

Etymology
The name Indonesia derives from the Latin Indus, meaning "India", and the Greek nesos, meaning "island".The name dates to the 18th century, far predating the formation of independent Indonesia.In 1850, George Earl, an English ethnologist, proposed the terms Indunesians — and, his preference, Malayunesians — for the inhabitants of the "Indian Archipelago or Malayan Archipelago".In the same publication, a student of Earl's, James Richardson Logan, used Indonesia as a synonym for Indian Archipelago.However, Dutch academics writing in East Indies publications were reluctant to use Indonesia. Instead, they used the terms Malay Archipelago (Maleische Archipel); the Netherlands East Indies (Nederlandsch Oost Indië), popularly Indië; the East (de Oost); and even Insulinde.

From 1900, the name Indonesia became more common in academic circles outside the Netherlands, and Indonesian nationalist groups adopted it for political expression.[Adolf Bastian, of the University of Berlin, popularized the name through his book Indonesien oder die Inseln des Malayischen Archipels, 1884–1894. The first Indonesian scholar to use the name was Suwardi Suryaningrat (Ki Hajar Dewantara), when he established a press bureau in the Netherlands with the name Indonesisch Pers-bureau in 1913.

History
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. For example, trade links with both Indian kingdoms and China were established several centuries BCE.Trade has since fundamentally shaped Indonesian history.
From the seventh century CE, the powerful Srivijaya naval kingdom flourished as a result of trade and the influences of Hinduism and Buddhism that were imported with it.Between the eighth and 10th centuries CE, the agricultural Buddhist Sailendra and Hindu Mataram dynasties thrived and declined in inland Java, leaving grand religious monuments such as Sailendra's Borobudur and Mataram's Prambanan. The Hindu Majapahit kingdom was founded in eastern Java in the late 13th century, and under Gajah Mada, its influence stretched over much of Indonesia; this period is often referred to as a "Golden Age" in Indonesian history.

Although Muslim traders first traveled through South East Asia early in the Islamic era, the earliest evidence of Islamized populations in Indonesia dates to the 13th century in northern Sumatra.Other Indonesian areas gradually adopted Islam, and it was the dominant religion in Java and Sumatra by the end of the 16th century. For the most part, Islam overlaid and mixed with existing cultural and religious influences, which shaped the predominant form of Islam in Indonesia, particularly in Java.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.The Netherlands tried to reestablish their rule, and an armed and diplomatic struggle ended in December 1949, when in the face of international pressure, the Dutch formally recognized Indonesian independence(with the exception of The Dutch territory of West New Guinea, which was incorporated following the 1962 New York Agreement, and UN—mandated Act of Free Choice).
Sukarno moved from democracy towards authoritarianism, and maintained his power base by balancing the opposing forces of the Military, and the Communist Party of Indonesia (PKI).An attempted coup on 30 September 1965 was countered by the army, who led a violent anti-communist purge, during which the PKI was blamed for the coup and effectively destroyed.Between 500,000 and one million people were killed.The head of the military, General Suharto, out-maneuvered the politically weakened Sukarno, and was formally appointed president in March 1968. His New Order administration was supported by the US government,and encouraged foreign direct investment in Indonesia, which was a major factor in the subsequent three decades of substantial economic growth.However, the authoritarian "New Order" was widely accused of corruption and suppression of political opposition.

In 1997 and 1998, Indonesia was the country hardest hit by the Asian Financial Crisis.This increased popular discontent with the New Order and led to popular protests. Suharto resigned on 21 May 1998.In 1999, East Timor voted to secede from Indonesia, after a twenty-five-year military occupation that was marked by international condemnation of often brutal repression of the East Timorese.The Reformasi era following Suharto's resignation, has led to a strengthening of democratic processes, including a regional autonomy program, and the first direct presidential election in 2004. Political and economic instability, social unrest, corruption, and terrorism have slowed progress. Although relations among different religious and ethnic groups are largely harmonious, acute sectarian discontent and violence remain problems in some areas.A political settlement to an armed separatist conflict in Aceh was achieved in 2005.