Brunei is a small, wealthy sultanate on the island of Borneo in Southeast Asia, its territory split into two parts and surrounded on land by Malaysia, facing the South China Sea. Once the seat of a powerful maritime empire that held sway over much of Borneo and beyond, it shrank over the centuries to its present modest size. Today, thanks to vast reserves of oil and natural gas, it is one of the richest nations in the region, an Islamic absolute monarchy ruled by one of the world's longest-reigning and wealthiest sovereigns.

Brunei's history runs from a great maritime empire, through a long decline and a British protectorate, to the transformation wrought by oil.

Brunei rose to prominence as a powerful Islamic sultanate, and at its height in the fifteenth and sixteenth centuries it controlled much of the island of Borneo and reached to parts of the present-day Philippines, growing rich on the trade of the South China Sea. Its rulers maintained diplomacy and commerce across maritime Asia, sending embassies as far as the imperial court of China.

The tomb of a king of Brunei in Nanjing, China, who died there in 1408 while on a royal visit to the Ming court. It is a striking relic of the far-reaching trade and diplomacy of the Brunei sultanate at its height.
The tomb of a king of Brunei in Nanjing, China, who died there in 1408 while on a royal visit to the Ming court. It is a striking relic of the far-reaching trade and diplomacy of the Brunei sultanate at its height.Credit: Shallowell (CC BY-SA 3.0).
Envoys from Brunei among the foreign delegations at the court in Beijing, in an eighteenth-century Chinese painting. The sultanate kept up trade and diplomacy across maritime Asia for centuries.
Envoys from Brunei among the foreign delegations at the court in Beijing, in an eighteenth-century Chinese painting. The sultanate kept up trade and diplomacy across maritime Asia for centuries.Credit: China, 1761 painter (Public domain).

From the nineteenth century Brunei's power waned as it lost territory piece by piece. The English adventurer James Brooke was made rajah of Sarawak and carved an ever-larger private domain out of Brunei's lands, and other territory passed to expanding colonial powers, shrinking the once-great sultanate to a small remnant on the coast.

The signing of a treaty by which Brunei ceded the island of Labuan to Britain in 1846. Through such agreements the sultanate steadily lost territory, including the vast lands that became the domain of the Brooke rajahs in Sarawak.
The signing of a treaty by which Brunei ceded the island of Labuan to Britain in 1846. Through such agreements the sultanate steadily lost territory, including the vast lands that became the domain of the Brooke rajahs in Sarawak.Credit: F. M. DELT. Printed by : M. N. HANHART LITH. (The British Collection) (Public domain).
A map showing how the island of Borneo was divided, with Brunei reduced to two small coastal enclaves surrounded by the Malaysian state of Sarawak. The once-mighty sultanate shrank to a fraction of its former reach.
A map showing how the island of Borneo was divided, with Brunei reduced to two small coastal enclaves surrounded by the Malaysian state of Sarawak. The once-mighty sultanate shrank to a fraction of its former reach.Credit: Ranking Update (CC BY-SA 3.0).

Brunei became a British protectorate in the late nineteenth century, which preserved its sultan while placing its external affairs under British control. Occupied by Japan during the Second World War, it was fought over as the Allies returned, and the discovery of vast oil and gas reserves transformed its fortunes. Brunei gained full independence in 1984, one of the last states in the region to do so.

Sultan Ahmad Tajuddin, who ruled Brunei through the colonial era and the upheavals of the Second World War, from the dynasty that still reigns over the oil-rich sultanate today.
Sultan Ahmad Tajuddin, who ruled Brunei through the colonial era and the upheavals of the Second World War, from the dynasty that still reigns over the oil-rich sultanate today.Credit: Collected by NX85934 Gunner Percy Raymond Hancock, 2/3rd Anti-Aircraft Regiment. (Public domain).
The Japanese battleship Nagato, part of a fleet that used Brunei Bay as an anchorage in 1944. Brunei was occupied by Japan during the Second World War before the Allies retook it.
The Japanese battleship Nagato, part of a fleet that used Brunei Bay as an anchorage in 1944. Brunei was occupied by Japan during the Second World War before the Allies retook it.Credit: 不明 (Unknown) (Public domain).
The Japanese surrender at nearby Labuan in 1945, at the end of the Second World War in Borneo. Brunei then returned to British protection before winning full independence in 1984.
The Japanese surrender at nearby Labuan in 1945, at the end of the Second World War in Borneo. Brunei then returned to British protection before winning full independence in 1984.Credit: Unknown authorUnknown author (Public domain).

Brunei occupies two separate enclaves on the northern coast of Borneo, divided by a sliver of the Malaysian state of Sarawak, with a coastline on the South China Sea. The country is mostly low coastal plain rising to hills and mountains inland, and much of its interior remains covered in dense, well-preserved tropical rainforest, among the best protected in the region. The climate is hot, humid, and rainy, typical of equatorial Borneo, and the rich forests support abundant wildlife, which the small and wealthy state has had the means to conserve.

Brunei is one of the last absolute monarchies in the world. The sultan, Hassanal Bolkiah, has reigned since 1967 and is among the longest-serving and wealthiest sovereigns on Earth; he also serves as prime minister and holds the defence, finance, and foreign-affairs portfolios, concentrating power firmly in the crown. There is no elected legislature with real authority, and the country is governed according to a national ideology known as the Malay Islamic Monarchy, which fuses Malay culture, Islam, and loyalty to the sultan. The crown prince, Al-Muhtadee Billah, is the heir apparent.

Sultan Hassanal Bolkiah, who has ruled Brunei since 1967 as one of the world's longest-reigning and wealthiest monarchs. He governs as an absolute ruler, also serving as prime minister and holding the defence, finance, and foreign-affairs portfolios.
Sultan Hassanal Bolkiah, who has ruled Brunei since 1967 as one of the world's longest-reigning and wealthiest monarchs. He governs as an absolute ruler, also serving as prime minister and holding the defence, finance, and foreign-affairs portfolios.Credit: Chin Yu Chu / Pangalau (CC BY-SA 2.0).

Brunei's wealth flows almost entirely from oil and natural gas, drawn from onshore and offshore fields, which have given this small country one of the highest incomes in the region. That petroleum wealth funds a generous welfare state, with free healthcare and education, subsidised housing and fuel, and no personal income tax. The great challenge is dependence on a single, finite resource, and the government has long sought, with limited success, to diversify the economy beyond hydrocarbons before the wells run dry.

The Istana Nurul Iman, the sultan's palace on the outskirts of the capital and the largest residential palace in the world. Its scale reflects the extraordinary oil and gas wealth of the tiny state.
The Istana Nurul Iman, the sultan's palace on the outskirts of the capital and the largest residential palace in the world. Its scale reflects the extraordinary oil and gas wealth of the tiny state.Credit: Pangalau (CC BY-SA 4.0).
Flag of Brunei.
Flag of Brunei.

The flag of Brunei is yellow with two diagonal stripes of white and black across the centre and the national emblem in red in the middle. The yellow is the traditional colour of the sultan, while the white and black stripes represent the kingdom's chief ministers. The central emblem includes a crescent symbolising Islam, a parasol representing the monarchy, and upraised hands, along with a banner bearing the state motto in Arabic, which translates as always in service with God's guidance, reflecting the country's Islamic monarchy.

Islam is the official religion of Brunei and the foundation of its national identity and law, with the sultan as its head, and the majority of the population are Muslim, predominantly Sunni. The country follows the official ideology of the Malay Islamic Monarchy, blending Malay culture, Islam, and loyalty to the crown. There are significant minorities, including Buddhists among the Chinese community and some Christians and followers of indigenous beliefs, but public religious life is firmly Islamic, expressed in grand mosques and a devout observance woven through daily life and the calendar.

The Sultan Omar Ali Saifuddien Mosque in the capital, Bandar Seri Begawan, with its golden dome and ceremonial stone barge on the lagoon. Its splendour reflects the central place of Islam in the life of the sultanate.
The Sultan Omar Ali Saifuddien Mosque in the capital, Bandar Seri Begawan, with its golden dome and ceremonial stone barge on the lagoon. Its splendour reflects the central place of Islam in the life of the sultanate.Credit: Abdullah Geelah (CC BY-SA 3.0).

Bruneian cuisine resembles that of neighbouring Malaysia and the wider region, built on rice, fish, and the abundant produce of the tropics, with halal practice shaping what is eaten. A distinctive national dish is ambuyat, a sticky, starchy paste made from the interior of the sago palm, eaten with a tangy dipping sauce and a special bamboo fork. Rice dishes, noodles, grilled fish and meats, and rich, spiced curries and sauces are common, reflecting Malay, Chinese, and Indian influences in a small but flavourful food culture.

Agriculture plays only a minor role in Brunei's economy, and the wealthy country imports most of its food. What farming exists produces rice, fruit, vegetables, and poultry, and the government has sought to increase domestic food production for greater self-sufficiency, mindful of how completely the nation depends on imports and on the income from its wells.

Bruneian society is prosperous, orderly, and deeply traditional, shaped by Malay custom, Islam, and devotion to the sultan. Its most distinctive emblem is Kampong Ayer, the great water village on stilts over the Brunei River, where a substantial share of the capital's people have lived for centuries in wooden houses linked by boardwalks and water taxis, a way of life that has endured beside the wealth of the modern oil state. Elaborate royal ceremonies, above all the sultan's birthday, and a quiet, family-centred life mark the rhythm of the country.

Kampong Ayer, the historic water village of stilt houses on the Brunei River in the heart of the capital. Home to a large part of the city's population for centuries, it endures beside the wealth of the modern oil state.
Kampong Ayer, the historic water village of stilt houses on the Brunei River in the heart of the capital. Home to a large part of the city's population for centuries, it endures beside the wealth of the modern oil state.Credit: Balou46 (CC BY-SA 3.0).

Brunei's blend of absolute monarchy and Islamic law has drawn international attention and criticism. From 2014 the country began phasing in a strict Sharia penal code, fully in force from 2019, which on paper prescribes severe punishments, including amputation for theft and death by stoning for offences such as adultery and same-sex relations. The move was condemned by many governments and rights groups abroad, prompting boycotts of Brunei-owned businesses, and in response the sultan stated that a longstanding moratorium on carrying out the death penalty would extend to these new provisions. Supporters within Brunei present the code as an expression of the nation's faith and sovereignty, while critics abroad regard it as a grave breach of human rights. The gap between the law as written and how far it is enforced, and the wider question of political and personal freedoms in an absolute monarchy, remains a sensitive subject.

Brunei has a population of around 450,000 people, the majority ethnic Malays, alongside a substantial Chinese minority and smaller communities of indigenous peoples of Borneo and others. Malay is the official language, English is widely used, and Islam shapes public life. The population enjoys a high standard of living funded by the country's energy wealth, and most people live in the coastal districts, especially in and around the capital, Bandar Seri Begawan. The small, prosperous, and tightly governed nation has one of the highest per capita incomes in the region.