🇸🇹 Sao Tome and Principe

Portuguese navigators discovered and claimed Sao Tome and Principe in the late 15th century and developed a sugar-based plantation economy there.

Portuguese navigators João de Santarém and Pêro Escobar put ashore on islands that had no prior human population and judged them suitable as bases for trade with the African mainland; the dates are sometimes given as 1471 for São Tomé and 17 January 1472 for Príncipe. The islands were settled soon afterwards by Portuguese colonists, convicts and enslaved Africans brought to cultivate sugar, and São Tomé briefly became the world's largest sugar producer during the sixteenth century before Brazilian competition undercut the trade. The discovery began the entire settled history of the territory and tied it to Portugal for five centuries.

Caminha received the island as a grant from the Portuguese crown and founded the first durable colony; Príncipe was settled in 1500 under a similar arrangement. Settlers were hard to attract, so most early inhabitants were convicts and deportees, including some 2,000 Sephardic Jewish children taken from the Iberian peninsula for the sugar plantations. The volcanic soil proved well suited to sugar cultivation.

The island originally named Santo Antão was renamed Prince's Island in reference to the Prince of Portugal, to whom duties on its sugar crop were paid. The change reflected the fiscal integration of the islands into the Portuguese royal revenue system.

By this date the islands functioned as holding and transit points for enslaved Africans moving through the Gulf of Guinea trade. The role established the archipelago's central position in the early Atlantic slave economy, on which its economy depended until after 1600.

The arrival of water-powered milling allowed industrial-scale processing, and mills multiplied rapidly alongside expanding cane fields. Contemporary observers noted abundant streams and timber for building more. By the mid-16th century the settlers had made the islands Africa's foremost sugar exporter.

The royal decree freed African wives of white settlers and their mixed-race offspring, part of a deliberate policy of encouraging interracial unions to secure a colony shunned by voluntary migrants. A further decree in 1517 freed the male slaves who had arrived with the first colonists. These measures created a free mixed-race population unusual in Atlantic slave colonies.

A royal charter after 1520 allowed married, property-owning free mulattos to hold public office, and a decree of 1546 established their civil equality with white settlers. This gave free mixed-race and black citizens routes into local politics and business, though it also fuelled frequent disputes in town councils and with governors and bishops.

From this year the island shipped enslaved people to the Caribbean and Brazil, extending its role from regional entrepôt to transatlantic supplier. Between 1532 and 1536 it sent an annual average of 342 slaves to the Antilles, and before 1580 it accounted for 75 per cent of Brazil's imports.

Escaped slaves living in interior settlements known as macambos organised attacks on plantations, some of which were abandoned. Portuguese authorities lodged a formal complaint in 1531 warning the island could be lost, and a 'bush war' in 1533 saw a 'bush captain' lead militia to suppress the maroons. Maroon resistance kept settlers out of the southern and western regions for decades.

The Angolares are reputed to descend from Angolan slaves who survived a shipwreck off the islands and thereafter lived by fishing. They form a distinct community within the national population.

A wealthy mulatto planter supported two men claiming free birth in petitioning the king to be declared free, and the request was approved. The case was a significant precedent in the maroon struggle for legal freedom on the islands.

Sustained campaigns broke the runaway slave forces, and by 1593 the governor declared maroon resistance almost entirely extinguished. Nevertheless maroon populations continued to deter settlement in the island's south and west.

Exploiting a government weakened by feuding between bishop and governor, the enslaved man Amador, who proclaimed himself king of the formerly enslaved plantation workers, recruited 5,000 followers who made three raids on the town and destroyed 60 of the island's 85 sugar mills, briefly threatening Portuguese control of the sugar economy. The militia crushed the rising after three weeks; 200 slaves died in combat and Amador and other leaders were executed, the rest amnestied. The revolt accelerated the decline of São Tomé's sugar economy, and Amador is now regarded as a national hero.

Competition from Western Hemisphere sugar colonies, an uncontrollable enslaved population and Portugal's inability to invest caused sugar cultivation to fall away over roughly a century. The islands' economic role narrowed to servicing ships carrying slaves between continental Africa and the Americas.

The islands' collapsed sugar-based economy gave way in the early 19th century to two new plantation cash crops, coffee and cocoa, both grown with African plantation slave labour, a form of which lingered into the 20th century. Cocoa in particular became dominant and remains the country's most important crop.

Portugal formally ended slavery in its colonies, but legal abolition did not end coercion on the islands: the roças system gave plantation managers wide authority and planters recruited indentured contract workers from Angola, Cabo Verde and Mozambique for São Tomé's cocoa plantations under conditions reportedly differing little from enslavement until reforms around 1910. Scientific American documented the continued use of slaves in São Tomé in its issue of 13 March 1897, and controversy over Angolan contract labour persisted into the 20th century.

Plantation output made the archipelago the leading global cocoa exporter, earning it the name the 'Chocolate Islands'. The crop remains the country's most important, and plantation agriculture has underpinned the economy since the 19th century.

Eddington's observations on Príncipe provided one of the first successful empirical tests of Einstein's general theory of relativity. The expedition gave the islands a permanent place in the history of modern physics.

The MLSTP was formed as decolonisation gathered pace across Africa and eventually based itself in nearby Gabon. It gained momentum through the 1960s and became the vehicle for independence and the country's ruling party after 1975.

Forced-labour demands on plantations triggered riots and violence in February 1953 in which Portuguese colonial police, forces and settlers killed several hundred African Forro labourers around the village of Batepá. Estimates of the death toll vary widely and no official figure has been published. The massacre became a founding grievance of São Toméan nationalism, and its anniversary is still officially observed.

Most of the roughly 4,000 Portuguese residents left the islands around independence, while several hundred São Toméan refugees arrived from Angola. The exodus stripped the new state of much of its administrative and technical personnel.

After the overthrow of the Caetano dictatorship in April 1974, the new Portuguese government committed to dissolving its overseas empire and met MLSTP representatives in Algiers. The agreement set up a transitional government leading directly to independence.

Sovereignty passed peacefully from Portugal on 12 July 1975 after a transitional government arising from Portugal's own 1974 revolution and decolonisation talks, with MLSTP Secretary General Manuel Pinto da Costa chosen as first president. The new state was a one-party socialist republic, a system that lasted until 1990, and most Portuguese settlers left for Portugal. The United States has maintained relations with the country since 1975.

Two years after independence the state created São Tomé Province and Príncipe Province alongside six districts. The provinces were abolished after the 1990 constitution, leaving the districts as the only administrative subdivisions.

Facing severe economic difficulties, the government adopted IMF-backed adjustment and invited greater private participation in the parastatals and in agriculture, commerce, banking and tourism. It marked the start of a shift away from the state-run economy, followed by widespread privatisation from the early 1990s.

A referendum on 22 August 1990 endorsed a new constitution establishing multiparty democracy and a two-term limit on the presidency by a large majority, ending 15 years of single-party MLSTP government, legalising opposition parties and abolishing the provinces. The country was among the first in Africa to undergo such democratic reform, and the change led directly to the free and non-violent multiparty elections of 1991.

Parliamentary elections on 20 January 1991 saw the Democratic Convergence Party defeat the formerly sole ruling MLSTP, and Miguel Trovoada was elected president unopposed in March, becoming the country's first directly elected head of state.

The former ruling party recovered strongly at local level, taking majorities on five of the seven regional councils. It went on to win a plurality in the early legislative elections of October 1994 and an outright majority in November 1998.

The US federal broadcaster signed a long-term agreement to establish a relay transmitting facility on São Tomé. It gave the islands a role in international broadcasting infrastructure and deepened ties with Washington.

Soldiers detained President Miguel Trovoada on 15 August 1995 and declared a Junta of National Salvation, citing unpaid wages and poor conditions. Angolan-mediated talks restored civilian rule within a week in exchange for a blanket amnesty.

Frequent internal wrangling between the political parties precipitated repeated changes in leadership and failed coup attempts in 1995 and 2003.

Vila Nova took more than 55 per cent of the vote on 19 July 2026, well ahead of challenger Nito Abreu on around 41 per cent, avoiding a runoff. The National Electoral Commission announced preliminary results the next day.

President Vila Nova approved the Ilhéu das Rolas–Malanza–Jalé and Santana sites off São Tomé island at the conference in Mombasa, Kenya. Six further sites around Príncipe are due to follow during 2026, forming an eight-site network of about 93 square kilometres.

The agreement followed a mission in April 2026 under the 52-month arrangement approved in December 2024. The Fund projected growth would slow to 0.4 per cent in 2026 after a subdued 2025, while inflation eased into single digits.

Bids for blocks 7, 8 and 9, offering stakes of up to 85 per cent, were due by 30 June 2026, with production-sharing contracts targeted for later in the year. The government hopes to build on renewed industry interest in its unproven Gulf of Guinea waters.

Authorities reported 42,000 visitors in 2025, a modest rise on the previous year, with Portugal remaining the leading source market ahead of France and Angola. The government has set a target of 50,000 arrivals a year by 2030.

The Energy Transition, Efficiency and Expansion Project, worth 30 million dollars in total, funds a new solar plant and battery storage on Príncipe island. Around 95 per cent of the country's electricity still comes from imported diesel, with daily outages affecting hospitals and schools.

The archipelago took over the CPLP's rotating chair, a position that included coordinating the bloc's election observation mission for its own presidential poll in July. The CPLP groups nine Portuguese-speaking states across four continents.

The deepwater well in Block 10, drilled to around 3,000 metres, confirmed an active petroleum system but found no commercially viable reserves, according to results reported in January 2026. Data from the well is being used to guide further exploration in the basin.

The president called the presidential vote for 19 July and legislative, regional and municipal elections for 27 September 2026, opening a year of overlapping campaigns. The announcement followed a turbulent 2025 in which the presidency changed prime minister three times within a week.

The designation on 27 September 2025 made São Tomé and Príncipe the first country recognised as a biosphere reserve in its entirety, following an earlier designation for Príncipe island. The status recognises the archipelago's biodiversity and supports sustainable tourism and conservation funding.

Vaz succeeded Patrice Trovoada on 9 January 2025 and held office until Américo Ramos was appointed on 12 January. The rapid turnover illustrated continuing instability at the head of government.

An armed attempt to seize power was defeated shortly after Patrice Trovoada was appointed prime minister by President Carlos Vila Nova. The failure preserved the newly formed constitutional government.

The new accord covered military training and maritime security. It strengthened the small state's capacity to police its extensive Gulf of Guinea waters.

Led by former prime minister Patrice Trovoada, the ADI defeated Jorge Bom Jesus's MLSTP/PSD. Trovoada was duly appointed prime minister by President Carlos Vila Nova, completing the party's control of both executive offices.

The centre-right ADI candidate took the presidency, restoring his party to the head of state. He later appointed Patrice Trovoada prime minister after the ADI's 2022 legislative victory.

The MLSTP-PSD leader took office after the ADI lost its governing position. Portuguese President Marcelo Rebelo de Sousa had visited that year to underline the economic and cultural ties between the two countries.

The country joined the multilateral effort to outlaw nuclear weapons. Participation gave the small state a voice in a major disarmament initiative.

The government severed ties with Taipei on 21 December 2016 and restored relations with Beijing days later, reportedly after seeking financial assistance including port infrastructure funding. The switch left Taiwan with only two remaining African allies, Burkina Faso and Swaziland.

Trovoada, leader of the Independent Democratic Action party, took office as head of government. His party also supplied Evaristo Carvalho, who defeated incumbent Manuel Pinto da Costa in the 2016 presidential election.

Chinese finance supported transport infrastructure from 2013, though investment has since stalled. The main ports at São Tomé city and Neves, previously very degraded, were modernised in 2014.

The reserve was created under the Man and the Biosphere Programme, recognising the island's forests and endemic species. In 2025 the designation was extended to São Tomé, making the country the first to be designated a biosphere reserve in its entirety.

In 2012 the opposition combined to topple the majority government of former Prime Minister Patrice Trovoada. The new government of Prime Minister Gabriel Arcanjo Ferreira da Costa was composed entirely of opposition party members with limited experience in governance.

An attempt to overthrow President Fradique de Menezes was defeated and the plotters imprisoned, though they later received a presidential pardon. The episode underlined the fragility of civilian control over the security forces.

The coalition supporting President de Menezes secured enough seats to form a government, closing four years of opposition-led cabinets. De Menezes then won a second five-year term on 30 July 2006, defeating Patrice Trovoada and Nilo Guimarães, and ruling-coalition members dominated local elections on 27 August 2006, the first since 1992.

Soldiers led by Major Fernando Pereira seized power on 16 July 2003 while President Fradique de Menezes was visiting Nigeria, complaining of corruption, poverty and that coming oil revenues would not be shared fairly. A negotiated accord reinstated Menezes within a week and the coup leaders received an amnesty, but the episode and subsequent emergency spending caused the IMF to reassess the country's debt relief.

The legal change opened the sector, and several other banks entered a market previously held by a single institution. It broadened financial intermediation in a very small economy.

Backed by the Independent Democratic Action party, de Menezes won outright and took office in September 2001. Parliamentary elections followed in March 2002, after which a series of short-lived opposition-led governments held office for four years.

The two states settled overlapping claims in the Niger Delta geologic province by creating a joint development zone. The JDZ was opened to bids by international oil firms in April 2003 and divided into nine blocks; in April 2004 block one went to ChevronTexaco, ExxonMobil and the Dangote Group, with São Tomé taking 40 per cent of the $123 million bid. Prospective oil revenue transformed the country's economic and political outlook.

The programme targeted inflation of 3 per cent for 2001, growth of 4 per cent and a smaller fiscal deficit. Later in 2000 the country qualified for substantial debt relief under the IMF–World Bank Heavily Indebted Poor Countries initiative, though this was reassessed after the 2003 coup and emergency spending.

New petroleum discoveries in the Gulf of Guinea may attract increased international attention to the small island nation, which has otherwise depended on cocoa and foreign aid.

The island of Príncipe became an autonomous region, coterminous with the district of Pagué. The arrangement gave the smaller island its own self-governing institutions within the unitary state.