This article traces the history of decolonization as a global process, from early anti-colonial movements through the dissolution of formal European empires and the subsequent restructuring of international relations. For broader context, see Decolonization and Cold War History - History. Related articles: decolonization-consensus-timeline-consensus, Cold War - Non-Aligned Viewpoint.

By the early twentieth century, European powers - primarily Britain, France, Belgium, the Netherlands, Portugal, Spain, and Italy - governed approximately 85 percent of the earth's land surface either directly or through protectorates and mandates. The British Empire alone encompassed roughly a quarter of the world's population. Colonial administration varied in form: settler colonies, crown colonies, protectorates, and League of Nations mandates each carried distinct legal and administrative arrangements, but in all cases political authority was held by the metropolitan power.

Colonial economies were typically organized to extract raw materials and agricultural commodities for export to Europe, with manufactured goods flowing in the reverse direction. Infrastructure investment - railways, ports, telegraph lines - generally served export rather than internal development. Indigenous political participation ranged from negligible to nonexistent in most territories, though the degree of cultural and legal suppression varied considerably by empire and territory.

Intellectual foundations for anti-colonial argument developed in parallel with colonial expansion. Enlightenment-era arguments about natural rights, when applied universally, produced tensions with colonial rule that were noted by contemporaries. By the nineteenth century, writers and activists in colonized territories - and some in Europe - were articulating arguments for self-determination on liberal, nationalist, and later Marxist grounds.

World War I destabilized the colonial order in several ways. Colonial subjects served in European armies in large numbers - approximately 600,000 African soldiers served under French command alone - and returned with broader political horizons. Woodrow Wilson's Fourteen Points (1918), which included the principle of national self-determination, were interpreted by anti-colonial activists across Asia and Africa as applicable to their situations, though Wilson and his allies applied the principle primarily to European nationalities.

The Paris Peace Conference (1919) redistributed German and Ottoman territories as League of Nations mandates rather than granting independence, disappointing nationalist movements in the Middle East and elsewhere. The Vietnamese nationalist Ho Chi Minh, then living in Paris, submitted a petition to the conference requesting autonomy for French Indochina; it was not received. The conference's selective application of self-determination was noted by contemporaries in colonized territories.

The interwar period saw the consolidation of organized nationalist movements across Asia and Africa. The Indian National Congress, founded in 1885, became a mass organization under Mohandas Gandhi's leadership after 1920, pursuing independence through campaigns of civil disobedience. The Wafd Party in Egypt, the Destour in Tunisia, and the Istiqlal in Morocco pursued independence through a combination of political organization and negotiation. The Pan-African Congresses, beginning in 1919 under W.E.B. Du Bois, convened delegates from across the African diaspora to press for greater rights and eventual self-government.

Marxist-Leninist analysis of imperialism - developed by Lenin in Imperialism, the Highest Stage of Capitalism (1916) - provided an influential theoretical framework that linked colonial exploitation to European capitalism. The Communist International (Comintern), from 1919 onward, actively supported anti-colonial movements and provided organizational support and training to nationalist leaders in Asia, Africa, and Latin America. This created alignments between communist organizations and nationalist movements that would persist through the Cold War era.

World War II accelerated the timeline of decolonization through several mechanisms. Japan's rapid military defeats of British, Dutch, French, and American forces across Southeast Asia in 1941-1942 shattered the image of European invincibility. Japanese occupation governments, though often brutal in practice, displaced European colonial administrations and in some cases armed and trained indigenous forces. When Japan surrendered in 1945, the returning European powers found altered political landscapes.

The Atlantic Charter (1941), signed by Churchill and Roosevelt, declared the right of peoples to choose their own form of government. Churchill subsequently claimed the Charter did not apply to the British Empire; Roosevelt and postwar American administrations generally held a more expansive view, reflecting both American anti-colonial traditions and strategic interest in opening closed colonial markets. This divergence between the United States and its European allies over colonialism was a persistent source of tension through the 1950s.

The United Nations Charter (1945) included language on self-determination in Articles 1 and 55, and established a Trusteeship Council to oversee non-self-governing territories. The UN framework provided institutional mechanisms and rhetorical resources for independence movements and newly independent states.

The first major postwar wave of independence occurred in Asia. The Philippines received independence from the United States in 1946 as previously scheduled. Britain granted independence to the Indian subcontinent in 1947, partitioning the territory into India and Pakistan amid communal violence that killed between 200,000 and one million people by most estimates, with some historians citing higher figures, and displaced approximately 10-20 million. Burma (1948) and Ceylon (1948) followed. The Dutch attempted to reassert control over the Netherlands East Indies but were defeated by the Indonesian nationalist forces of Sukarno and Mohammad Hatta, who had declared independence in 1945; the Netherlands recognized Indonesian sovereignty in 1949 under American and UN pressure. France fought protracted counterinsurgencies in Indochina (1946-1954) and Algeria (1954-1962).

The establishment of the People's Republic of China in 1949 altered the strategic calculus for Western powers, providing a large communist state as a potential patron for anti-colonial movements in Asia.

British withdrawal from the Middle East proceeded in stages. Transjordan became independent as the Hashemite Kingdom of Jordan in 1946. Britain's 1947 withdrawal from the Palestine Mandate - turning the question over to the United Nations - resulted in the 1948 Arab-Israeli War and the establishment of the State of Israel. British forces withdrew from Egypt in phases, with the Suez Canal Zone remaining under British control until the Anglo-Egyptian Agreement of 1954.

The 1952 Free Officers' coup in Egypt brought Gamal Abdel Nasser to power. Nasser's nationalization of the Suez Canal Company in July 1956 precipitated the Suez Crisis, in which Britain, France, and Israel launched a coordinated military operation against Egypt in October-November 1956. American pressure, including threatened financial sanctions against Britain, forced a ceasefire and withdrawal. The Suez Crisis marked a visible decline in British and French capacity to project power independently of the United States and demonstrated the leverage available to newly independent states through Cold War superpower competition.

Libya gained independence from Italian and British administration in 1951. Morocco and Tunisia achieved independence from France in 1956. Sudan became independent in 1956 following a condominium arrangement with Britain and Egypt. The Algerian War of Independence (1954-1962) was fought with particular intensity, involving extensive use of torture by French forces, mass displacement of rural Algerians, and ultimately the migration of approximately one million French settlers (pieds-noirs) to France following Algerian independence in 1962.

Ghana, under Kwame Nkrumah, became the first sub-Saharan African state to achieve independence in 1957. Guinea under Sékou Touré voted against joining the French Community in 1958 and received independence immediately, with France withdrawing personnel and materiel abruptly.

1960 is conventionally called the “Year of Africa”: seventeen states achieved independence that year, including Nigeria, the Belgian Congo, Senegal, Mali, Madagascar, Somalia, Côte d'Ivoire, Chad, the Central African Republic, and others. Historians generally identify several contributing factors in the pace of decolonization in Africa: the success of earlier Asian independence movements, the Suez Crisis's demonstration of imperial overextension, growing domestic opposition in metropolitan countries to the costs of empire, and escalating demands from African political organizations.

The Belgian Congo's transition was abrupt and poorly prepared. Belgium granted independence in June 1960 with minimal preparation of Congolese administrative and military cadres. Within weeks, a mutiny of the Congolese army, Katanga's attempted secession under Moise Tshombe (backed by Belgian mining interests), and the assassination of Prime Minister Patrice Lumumba in January 1961 produced a prolonged crisis involving UN peacekeeping forces, Belgian intervention, and covert operations by the United States and the Soviet Union. Lumumba's killing became a defining episode for subsequent generations of African and Third World politicians and intellectuals.

Britain's approach in East and Central Africa was complicated by the presence of white settler minorities in Kenya, Southern Rhodesia, and South Africa. The Mau Mau rebellion in Kenya (1952-1960) was suppressed by British forces with considerable violence, including detention camps in which documented abuses occurred. Kenya became independent in 1963 under Jomo Kenyatta. Tanzania (1961), Uganda (1962), and Zambia (1964) followed.

The Bandung Conference of April 1955, convened in Indonesia and attended by representatives of twenty-nine Asian and African states, articulated a collective position outside the Cold War blocs. The conference's Final Communiqué endorsed the principles of national sovereignty, non-interference, and opposition to colonialism in all forms. Nasser, Nehru, Sukarno, and Zhou Enlai were among the prominent attendees. The conference is generally regarded as the founding moment of the Non-Aligned Movement, formally constituted at the Belgrade Conference of 1961. For the Non-Aligned perspective on Cold War dynamics, see Cold War - Non-Aligned Viewpoint.

The Non-Aligned Movement sought to leverage superpower competition to extract aid and diplomatic support from both blocs without formal military alignment with either. In practice, individual member states maintained varying degrees of alignment with one bloc or the other, and the movement's internal coherence was limited by divergent national interests.

The UN General Assembly's Declaration on the Granting of Independence to Colonial Countries and Peoples (Resolution 1514, December 1960), passed 89-0 with nine abstentions (including the United States, Britain, France, Portugal, and South Africa), established a normative framework within the UN for rapid decolonization.

Portugal, under the Estado Novo authoritarian government, refused to decolonize and fought protracted wars against independence movements in Angola, Mozambique, and Guinea-Bissau from the early 1960s onward. The wars consumed approximately 40 percent of the Portuguese state budget and contributed to the 1974 Carnation Revolution, in which military officers overthrew the Caetano government. The new Portuguese government rapidly withdrew from its African territories: Guinea-Bissau (1974), Mozambique and Cape Verde (1975), Angola (1975), and São Tomé and Príncipe (1975).

Angola's independence was immediately followed by a civil war among three competing independence movements - the MPLA, UNITA, and FNLA - into which Cuba, the Soviet Union, South Africa, and the United States intervened. The Angolan Civil War continued until 2002.

Southern Rhodesia's white-minority government issued a Unilateral Declaration of Independence from Britain in 1965, establishing the state of Rhodesia, which was not recognized internationally. Armed struggle by the Zimbabwe African National Union (ZANU) and Zimbabwe African People's Union (ZAPU) led to the Lancaster House Agreement (1979) and internationally supervised elections in 1980, producing the independent state of Zimbabwe under Robert Mugabe.

Namibia (South West Africa), administered by South Africa under a League of Nations mandate, achieved independence in 1990 following a prolonged guerrilla war by the South West Africa People's Organization (SWAPO) and international pressure. South Africa itself transitioned from apartheid minority rule through negotiated settlement, with the first non-racial elections held in April 1994.

Hong Kong and Macau, the last substantial European colonial territories, reverted to Chinese sovereignty in 1997 and 1999 respectively.

Independence did not uniformly produce stable or prosperous states. Newly independent governments inherited colonial-era borders drawn without regard to ethnic or linguistic divisions, administrative structures designed for extraction rather than development, and economies integrated into metropolitan supply chains. Many states experienced coups, civil wars, or authoritarian consolidation in the years following independence.

The franc CFA, a currency union maintained between France and its former West and Central African territories, continued to link those economies to France through fixed exchange rates and French oversight of foreign reserves. Similar economic dependencies persisted in various forms across former British, Belgian, and other colonial territories.

Cold War competition produced extensive foreign intervention in newly independent states. Both the United States and the Soviet Union supported or undermined governments based on strategic alignment rather than democratic performance, a dynamic that shaped the political trajectories of states from the Congo to Vietnam to Chile.

Whether the pace of decolonization was primarily determined by metropolitan decisions or by the autonomous agency of anti-colonial movements is a persistently contested question among historians; see decolonization-controversy-metropolitan-agency-controversy.

The extent to which Cold War superpower pressure, particularly from the United States, accelerated or complicated decolonization relative to internal imperial dynamics remains disputed; see decolonization-controversy-cold-war-acceleration-controversy.

Whether post-independence economic arrangements with former colonial powers constituted a structural continuation of dependency (“neocolonialism,” in Nkrumah's formulation) or a rational response to development constraints is debated among economists and historians; see decolonization-controversy-neocolonialism-controversy.

The causal weight of colonial economic structures versus post-independence governance in explaining developmental outcomes in formerly colonized states is actively disputed in economic history and development economics; see decolonization-colonial-legacy-governance-debate.

Whether violence by independence movements should be assessed by the same normative standards as counterinsurgency violence by colonial states is a disputed interpretive question; see decolonization-viewpoint-anticolonial-violence-viewpoint.

1. Aimé Césaire, Discourse on Colonialism (Paris: Présence Africaine, 1955; trans. Joan Pinkham, New York: Monthly Review Press, 1972).

2. John Darwin, The Empire Project: The Rise and Fall of the British World-System, 1830-1970 (Cambridge: Cambridge University Press, 2009).

3. Raymond Betts, Decolonization (London: Routledge, 1998).

4. Odd Arne Westad, The Global Cold War: Third World Interventions and the Making of Our Times (Cambridge: Cambridge University Press, 2005).

5. Frederick Cooper, Africa Since 1940: The Past of the Present (Cambridge: Cambridge University Press, 2002).

6. Martin Thomas, Empires of Intelligence: Security Services and Colonial Disorder after 1914 (Berkeley: University of California Press, 2008).

7. Todd Shepard, The Invention of Decolonization: The Algerian War and the Remaking of France (Ithaca: Cornell University Press, 2006).

8. Frantz Fanon, The Wretched of the Earth (Paris: François Maspero, 1961; trans. Constance Farrington, New York: Grove Press, 1963).

9. Piero Gleijeses, Conflicting Missions: Havana, Washington, and Africa, 1959-1976 (Chapel Hill: University of North Carolina Press, 2002).

10. Crawford Young, The African Colonial State in Comparative Perspective (New Haven: Yale University Press, 1994).

11. United Nations General Assembly, Resolution 1514 (XV), “Declaration on the Granting of Independence to Colonial Countries and Peoples,” December 14, 1960.

12. Vijay Prashad, The Darker Nations: A People's History of the Third World (New York: The New Press, 2007).

13. Kwame Nkrumah, Neo-Colonialism: The Last Stage of Imperialism (London: Thomas Nelson & Sons, 1965).

14. Thomas Pakenham, The Scramble for Africa: White Man's Conquest of the Dark Continent from 1876 to 1912 (New York: Random House, 1991).

15. Caroline Elkins, Britain's Gulag: The Brutal End of Empire in Kenya (Cambridge: Harvard University Press, 2005).