Decolonization: how empires ended and the modern world was remade

By Khalid Al-Harbi

In 1945, roughly a third of the world’s people still lived under colonial rule. Thirty years later, the great European empires were gone. Between India’s independence in 1947 and the collapse of Portugal’s African empire in 1975, more than eighty new states joined the United Nations, the map of Africa and Asia was redrawn, and the language of international politics changed forever. Decolonization was not a single event but a generation-long unravelling — driven by war, by nationalist movements that had been organizing for decades, by the economics of empire, and by a new idea, enshrined at the United Nations, that peoples had a right to govern themselves.

The world that made empires untenable

Decolonization did not begin in 1945, but the Second World War made it unavoidable. The war bankrupted Britain and France, shattered the myth of European invincibility — Japanese victories in Malaya, Singapore and Burma in 1941–42 showed Asian and African soldiers and subjects that a European power could be beaten — and mobilized millions of colonial subjects as soldiers and workers who returned home unwilling to accept the old order. The British Indian Army alone grew to more than two million men, the largest volunteer force in history, and its veterans came home with new expectations, new organizational skills, and a sharpened sense of the contradiction between fighting for freedom abroad and living under colonial rule at home.

The war also changed the language of legitimacy. In August 1941, before the United States had even entered the war, President Franklin D. Roosevelt and Prime Minister Winston Churchill signed the Atlantic Charter, whose third point declared that they respected “the right of all peoples to choose the form of government under which they will live.” Churchill insisted the Charter applied only to Nazi-occupied Europe, not to the British Empire. But nationalist leaders across Asia and Africa seized on the words and refused to let them go. The Charter’s promise, echoed in the United Nations Charter of 1945 — which spoke of “equal rights and self-determination of peoples” — became the standard against which every colonial power was measured, and found wanting.

Economics did the rest. Britain emerged from the war with a debt of more than £3 billion and an economy dependent on American loans; France’s infrastructure was in ruins; the Netherlands and Belgium were smaller powers whose empires cost more to hold than they returned. Empire had always been justified as profitable. After 1945, the balance sheet looked different: colonial wars were ruinously expensive, colonial markets mattered less as Europe turned toward rebuilding its own continent and, from 1951, toward the European Coal and Steel Community, and American anti-colonial pressure — Washington preferred open markets to closed imperial trading blocs — made the old system diplomatically costly. Empire did not end because Europeans suddenly became generous. It ended because it became unaffordable, indefensible and, in the end, ungovernable.

Yet the decisive force was not European exhaustion alone. Nationalist movements had been building for decades: the Indian National Congress, founded in 1885; the Wafd in Egypt; the Neo-Destour in Tunisia; the National Council of Nigeria and the Cameroons; the Convention People’s Party in the Gold Coast. The war radicalized them. Leaders who had once asked for a share of power now demanded full sovereignty, and mass parties, trade unions, newspapers and student movements gave them an organized base. When London, Paris or Lisbon hesitated, strikes, boycotts, demonstrations and, in some places, armed struggle forced the pace. Decolonization was negotiated where colonial powers were willing to negotiate, and fought where they were not.

India shows the way: 1947 and Partition

India was the hinge on which the whole story turned. The British Raj was the largest, richest and most prestigious of all colonial possessions, and its loss signalled to every other colony that independence was possible. Mohandas Gandhi’s campaigns of non-violent non-cooperation, the Quit India movement of 1942 — which Britain suppressed with mass arrests — and the Royal Indian Navy mutiny of 1946 convinced London that the Raj could no longer be governed on the old terms. In February 1947, Prime Minister Clement Attlee announced that Britain would leave India by June 1948 at the latest. Lord Mountbatten, the last Viceroy, accelerated the timetable to August 1947.

What followed was both a triumph and a catastrophe. The Indian Independence Act of 1947, passed by the British Parliament in July, partitioned British India into two sovereign dominions: India and Pakistan. On 14–15 August 1947, Pakistan and India became independent. Jawaharlal Nehru, India’s first prime minister, spoke at midnight of a “tryst with destiny.” Muhammad Ali Jinnah became Pakistan’s first Governor-General. But Partition unleashed one of the largest mass migrations in human history — an estimated 10 to 15 million people crossed the new borders — and communal violence that killed, by most scholarly estimates, several hundred thousand people and perhaps as many as a million. The Punjab and Bengal were torn apart; trains arrived at their destinations full of corpses; the princely state of Kashmir became a dispute that would produce three wars and remains unresolved today.

India’s independence had three consequences that echoed far beyond South Asia. First, it demonstrated that even the greatest empire would leave rather than fight an unwinnable war to stay. Second, it gave the new United Nations a giant new member whose diplomacy — non-alignment, anti-colonial solidarity, support for the independence of others — reshaped the institution. Third, Partition became a warning: the way borders were drawn at independence would determine whether the new states lived in peace or in permanent conflict. That warning went unheeded in much of Africa, where colonial borders were kept intact with equally fateful results.

Africa’s decade: Ghana, the Year of Africa, and the Congo crisis

Africa’s turn came in the decade after India. The Gold Coast, under Kwame Nkrumah’s Convention People’s Party, led the way: on 6 March 1957, it became Ghana, the first sub-Saharan African colony to win independence, with Nkrumah — who had spent years in British prisons — as its first prime minister. Nkrumah’s declaration that Ghana’s independence was meaningless unless linked to the total liberation of Africa became the anthem of a generation. Guinea followed in 1958, when its voters rejected Charles de Gaulle’s French Community in a referendum and Sékou Touré accepted immediate independence — France responded by withdrawing its administrators and equipment, down to the light bulbs, in a punitive exit that Guinea never forgot.

Then came 1960, the Year of Africa: seventeen new states joined the United Nations in a single year, including Cameroon, Togo, Mali, Senegal, Madagascar, the Democratic Republic of the Congo, Somalia, Benin, Niger, Burkina Faso (then Upper Volta), Côte d’Ivoire, Chad, the Central African Republic, the Republic of the Congo, Gabon and Mauritania. Nigeria, Africa’s most populous country, became independent on 1 October 1960. The General Assembly was transformed almost overnight: the Afro-Asian bloc became the largest voting group in the United Nations, and in December 1960 it pushed through Resolution 1514, the Declaration on the Granting of Independence to Colonial Countries and Peoples, which proclaimed that “all peoples have the right to self-determination” and that “inadequacy of political, economic, social or educational preparedness should never serve as a pretext for delaying independence.” The vote was 89 in favour, none against, with nine abstentions — the colonial powers among them.

The Congo’s independence, on 30 June 1960, showed how quickly liberation could curdle into crisis. Within days the army mutinied, the mineral-rich Katanga province seceded with Belgian backing, and the Cold War arrived in force: the United States and the Soviet Union backed rival factions, the United Nations sent its first large peacekeeping force, and Prime Minister Patrice Lumumba — who had denounced colonialism at the independence ceremony — was arrested and, in January 1961, murdered. The Congo crisis became the template for Cold War entanglement in decolonization: independence movements that sought Soviet help were branded communist; Western powers that backed secessionists or dictators in the name of anti-communism found themselves defending the very structures decolonization was meant to dismantle.

Elsewhere in Africa the paths diverged sharply. In Kenya, the Mau Mau uprising of 1952–60 — a revolt of Kikuyu fighters against settler land theft — was crushed by a brutal British counter-insurgency that detained tens of thousands in camps, but it made continued colonial rule politically impossible; Kenya became independent in 1963 under Jomo Kenyatta. In Tanganyika, Julius Nyerere negotiated a peaceful independence in 1961 and went on to build Tanzania through the union with Zanzibar in 1964. In Algeria, as we shall see, France fought its longest and bloodiest colonial war. In the white-settler states of southern Africa — Rhodesia, South Africa, and Portugal’s Angola and Mozambique — the colonial order would hold on for another decade or more, and its end would come through war rather than negotiation.

France’s wars: Indochina, Suez and Algeria

No colonial power fought harder to keep its empire than France, and none paid a higher price. In Indochina, the Viet Minh under Ho Chi Minh had declared Vietnamese independence in September 1945, quoting the American Declaration of Independence. France tried to restore its rule, and the First Indochina War (1946–54) ended at Dien Bien Phu in May 1954, when Viet Minh forces overran a French garrison in a siege that became a symbol of colonial defeat. The Geneva Accords of July 1954 partitioned Vietnam at the 17th parallel, pending elections that were never held; France left, and the United States stepped into the vacuum — the first link in a chain that would lead to the Vietnam War.

Two years later came Suez. In July 1956, Egypt’s President Gamal Abdel Nasser nationalized the Suez Canal, and in October Britain and France, in secret collusion with Israel, invaded Egypt to retake it. The operation was a military success and a political catastrophe: the United States, furious at being kept in the dark, forced its own allies to withdraw, and the Soviet Union threatened intervention. The Suez Crisis of 1956 is remembered as the moment the world understood that Britain and France could no longer act as great imperial powers without American consent. It also made Nasser a hero across the Arab world and accelerated the radicalization of Arab nationalism.

Algeria was the deepest wound. The Algerian War (1954–62) began on 1 November 1954, when the National Liberation Front (FLN) launched attacks across the country. Algeria was not, in French law, a colony: it was three French departments, home to roughly a million European settlers (pieds-noirs) who had lived there for generations and refused to accept majority rule. The war that followed killed, by the most commonly cited estimates, several hundred thousand Algerians and tens of thousands of French soldiers, and it was fought with torture, bombings, and mass displacement on both sides. It brought down the French Fourth Republic in 1958 and brought Charles de Gaulle to power; in 1961, French generals in Algiers attempted a coup against de Gaulle when he moved toward negotiation. The Évian Accords of March 1962 ended the war, and Algeria became independent on 5 July 1962. Within months, most of the pied-noir population had fled to France. The Algerian war left a scar on French politics that has never fully healed, and it gave the FLN’s model of armed liberation a prestige that echoed from Angola to Palestine.

De Gaulle’s France learned the lesson quickly. In 1960, de Gaulle granted independence to most of France’s sub-Saharan African colonies — Senegal, Mali, Côte d’Ivoire, Niger and the rest — preferring negotiated influence to ruinous war. But the influence was real: through the network of defence agreements, currency arrangements (the CFA franc zone) and personal ties that came to be known as Françafrique, Paris retained a powerful presence in its former colonies long after the flags changed. Whether that presence was partnership or continued domination became one of the enduring debates of the post-colonial era.

Portugal’s long goodbye and the last empires

Portugal held on longest of all. Under the dictatorship of António de Oliveira Salazar and his successor Marcelo Caetano, Lisbon insisted that Angola, Mozambique and Guinea-Bissau were not colonies but “overseas provinces” of a single Portuguese nation. From 1961, liberation movements — the MPLA in Angola, FRELIMO in Mozambique, the PAIGC in Guinea-Bissau under Amílcar Cabral — fought wars that Portugal could not win but refused to lose. By the early 1970s, the colonial wars were consuming nearly half of Portugal’s state budget and a generation of young conscripts.

The end came not in Africa but in Lisbon. On 25 April 1974, the Carnation Revolution — a military coup by officers radicalized by the unwinnable wars — overthrew the dictatorship, and the new government moved swiftly to decolonize. Guinea-Bissau became independent in September 1974, Mozambique in June 1975 under FRELIMO’s Samora Machel, and Angola in November 1975, where the MPLA’s victory immediately plunged the country into a civil war that would last 27 years and draw in Cuba, South Africa, the Soviet Union and the United States. Portugal’s empire, the oldest in Europe — it had begun in Ceuta in 1415 — was gone within eighteen months.

The smaller colonial stories mattered too. The Netherlands fought and lost a war to keep Indonesia (1945–49) before accepting its independence under Sukarno. Belgium left the Congo in 1960 with almost no preparation — at independence, the Congo had fewer than twenty university graduates among its Congolese population — and then Rwanda and Burundi in 1962. Spain held its African enclaves into the 1970s. Britain, the largest empire of all, managed the most orderly retreat in most places — the Caribbean islands, Malaya (1957), Cyprus (1960), and the slow unwinding of its Pacific and Gulf possessions — but it also left behind the partition of India, the unresolved future of Palestine after the 1948 war, and, in Rhodesia, a white-minority regime that declared unilateral independence in 1965 and held on until 1980, when it became Zimbabwe under Robert Mugabe. The last great wave of decolonization ended with the handover of Hong Kong in 1997 and Macau in 1999, but the core story — the dismantling of the European territorial empires — was complete by the mid-1970s.

The United Nations, Bandung and the Cold War

Three institutions gave decolonization its global shape. The first was the United Nations itself. The UN Trusteeship Council supervised the last trust territories — Togoland, the Cameroons, Tanganyika, Ruanda-Urundi — toward independence, and the General Assembly became the forum where the new states pressed their case. The 1960 Declaration (Resolution 1514) and the 1961 creation of the Special Committee on Decolonization (the “Committee of 24”) gave the anti-colonial majority an institutional home. The United Nations also provided the legal vocabulary — self-determination, sovereignty, non-interference — that new states used to defend themselves once they were free.

The second was Bandung. In April 1955, twenty-nine Asian and African nations met in Bandung, Indonesia, for the first large conference of the formerly colonized world. The Bandung Conference, hosted by Sukarno and attended by Nehru, Nasser, Zhou Enlai and others, declared the principles of non-interference, respect for sovereignty, and opposition to colonialism in all its forms. From Bandung grew the Non-Aligned Movement, formally launched at Belgrade in 1961, which tried to chart a path between the American and Soviet blocs. Non-alignment was never as neutral as its name suggested — many of its members leaned one way or the other — but it gave the Global South a collective voice that neither superpower could ignore.

The third, and most corrosive, force was the Cold War. Washington and Moscow both claimed to be anti-colonial — America by tradition, the Soviet Union by ideology — and both treated every independence struggle as a front in their global contest. The United States backed France in Indochina, then inherited the war; it backed the Congo’s anti-Lumumba forces and, later, Mobutu’s dictatorship; it tolerated Portugal’s wars because Lisbon was a NATO ally. The Soviet Union armed liberation movements and denounced Western imperialism while crushing its own sphere — Hungary in 1956, Czechoslovakia in 1968 — and annexing territory in Eastern Europe. The result was that many new states won their flags but not their freedom of manoeuvre: their politics, their armies and their economies were pulled into superpower rivalry, and leaders who tried to steer an independent course — Lumumba, Nkrumah, Sukarno — were often removed, with or without foreign help.

Key figures

Decolonization was made by movements, but it was led by people whose names still define their countries. Mohandas Gandhi gave India its method — mass non-violent resistance — and paid for Partition with his life, assassinated in January 1948. Jawaharlal Nehru built the Indian state and the doctrine of non-alignment. Muhammad Ali Jinnah created Pakistan. Ho Chi Minh, who had petitioned Woodrow Wilson for Vietnamese self-determination in 1919 and been ignored, spent thirty years fighting for it and lived to see France defeated. Kwame Nkrumah turned Ghana into the symbol of African liberation and then into a cautionary tale of the charismatic leader who centralized power and was overthrown. Jomo Kenyatta moved from prison to presidency. Julius Nyerere preached African socialism and kept Tanzania at peace. Amílcar Cabral, the agronomist-turned-guerrilla who led Guinea-Bissau’s liberation, was assassinated in 1973, months before his country’s freedom. Ahmed Ben Bella and Houari Boumédiène led Algeria’s FLN to victory. Gamal Abdel Nasser made Egypt the centre of Arab nationalism. And on the other side, Charles de Gaulle — who had once embodied French resistance — accepted that the empire could not be saved, while Winston Churchill, who had vowed in 1942 that he had “not become the King’s First Minister in order to preside over the liquidation of the British Empire,” lived to see it liquidated anyway.

Timeline

• 1941 — The Atlantic Charter proclaims the right of all peoples to choose their form of government.
• 1945 — The United Nations is founded; its Charter speaks of self-determination of peoples.
• 1947 — India and Pakistan become independent (14–15 August); Partition follows.
• 1949 — Indonesia’s independence is recognized after war with the Netherlands.
• 1954 — Dien Bien Phu falls; the Geneva Accords end French rule in Indochina. The Algerian War begins (1 November).
• 1955 — The Bandung Conference gathers twenty-nine Asian and African nations.
• 1956 — The Suez Crisis: Britain and France fail to retake the canal from Egypt.
• 1957 — Ghana becomes independent (6 March), the first sub-Saharan African colony to do so.
• 1960 — The Year of Africa: seventeen states join the UN; Resolution 1514 declares the right to independence.
• 1962 — Algeria becomes independent (5 July) after the Évian Accords.
• 1974–75 — The Carnation Revolution ends Portugal’s dictatorship; Guinea-Bissau, Mozambique and Angola become independent.
• 1980 — Rhodesia becomes Zimbabwe, closing the last chapter of settler rule in southern Africa.

Consequences and legacy: borders, neocolonialism and the unfinished argument

The most visible legacy of decolonization is the map itself: nearly every state in Africa, much of Asia and the Caribbean took its borders from colonial decisions, not from its own history. In 1964, the Organisation of African Unity formally adopted the principle that colonial borders would be respected — uti possidetis — because reopening them would mean endless war. The bargain bought stability, but at a price: peoples divided by colonial lines (Somalis across five states, the Kurds across four, the Ewe between Ghana and Togo) became minorities in states that did not always protect them, and multi-ethnic states stitched together by colonial convenience — Nigeria, the Congo, Sudan — have spent decades managing, and sometimes fighting over, the tensions inside them. The Partition of India, the division of Palestine in 1948, and the Kashmir dispute are the same story in a different theatre: borders drawn in London, Paris or New York became the fault lines of the post-colonial world.

The second legacy is the argument over neocolonialism. Nkrumah coined the term in his 1965 book Neo-Colonialism: The Last Stage of Imperialism, arguing that formal independence had been replaced by economic control: foreign companies owned the mines and plantations, foreign banks held the debt, and former colonial powers kept military bases, currency unions and intelligence networks in place. The argument had real evidence behind it — the CFA franc zone tied fourteen African states’ currencies to the French treasury until its reforms decades later; Françafrique’s networks of advisers, contracts and interventions shaped the politics of West and Central Africa; multinational firms dominated the export of cocoa, copper, oil and bauxite. But the neocolonialism thesis also became an alibi: corruption, authoritarianism and economic mismanagement by post-independence governments could not be blamed on Paris or London alone, and the most successful post-colonial economies — South Korea, Singapore, Malaysia, Botswana — were precisely those that combined sovereignty with competent institutions, investment in education, and integration into world markets on their own terms. The honest verdict is that both forces were real: external structures constrained the new states, and the choices their leaders made within those constraints mattered enormously.

The third legacy is institutional. The Commonwealth, the Francophonie, the Arab League and the African Union (successor to the OAU) all grew out of the post-colonial settlement, and the United Nations itself was permanently changed: a body founded by 51 states in 1945 now has 193 members, and the majority of them are products of decolonization. The new states also built a lasting body of international law — on self-determination, on permanent sovereignty over natural resources (General Assembly Resolution 1803, 1962), on the law of the sea — that still governs how the world argues about resources and borders. And the languages of the colonizers — English, French, Spanish, Portuguese — remained the languages of administration, education and, in many cases, national literature, producing a post-colonial literature in English and French that is among the richest of the twentieth century, from Chinua Achebe’s Things Fall Apart to Frantz Fanon’s The Wretched of the Earth.

The argument is not finished. When Mali, Niger and Burkina Faso expelled French forces and withdrew from ECOWAS in the 2020s, when African states demanded the return of looted artefacts from European museums, when Caribbean nations pressed claims for reparations for slavery, and when the United Nations debated the legality of colonial-era borders in Western Sahara, the questions of 1945–75 were still alive: who owes whom what, who draws the lines, and what does it mean for a people to be free? Decolonization ended the empires. It did not end the argument about what should replace them — and that argument, in parliaments, courts, museums and streets around the world, is still the argument of our time.

Sources and further reading

• United Nations, Declaration on the Granting of Independence to Colonial Countries and Peoples, General Assembly Resolution 1514 (XV), 14 December 1960 (un.org).
• United Nations, Charter of the United Nations, 1945, Chapter XI (Declaration Regarding Non-Self-Governing Territories) and Chapter XII (International Trusteeship System).
• Atlantic Charter, joint declaration of President Franklin D. Roosevelt and Prime Minister Winston Churchill, 14 August 1941 (US National Archives).
• Indian Independence Act 1947 (UK Parliament, 10 & 11 Geo. 6 c. 30).
• Encyclopaedia Britannica, entries on “Decolonization,” “Partition of India,” “Algerian War,” “Year of Africa” and “Carnation Revolution” (britannica.com).
• Frantz Fanon, The Wretched of the Earth (1961); Kwame Nkrumah, Neo-Colonialism: The Last Stage of Imperialism (1965).
• Frederick Cooper, Africa Since 1940: The Past of the Present (Cambridge University Press, 2002).
• John Darwin, After Tamerlane: The Rise and Fall of Global Empires, 1400–2000 (Penguin, 2007) and The Empire Project (Cambridge University Press, 2009).
• Odd Arne Westad, The Global Cold War: Third World Interventions and the Making of Our Times (Cambridge University Press, 2005).