The most basic cause of imperial collapse was the rising demand of non-Western peoples for national self-determination, racial equality, and personal dignity. This demand spread from intellectuals to ordinary people in nearly every colonial territory after the First World War. By 1939 the colonial powers were already on the defensive; the Second World War prepared the way for the eventual triumph of independence movements.
European empires had been based on an enormous power differential between the rulers and the ruled, a difference that had greatly declined by 1945. Western Europe was economically devastated and militarily weak immediately after the war. Moreover, the Japanese had driven imperial rulers from large parts of East Asia during the war in the Pacific, shattering the myth of European superiority and invincibility. In Southeast Asia, European imperialists confronted strong anticolonial nationalist movements that re-emerged with new enthusiasm after the defeat of the Japanese.
To some degree, the Great Powers regarded their empires very differently after 1945 than before 1914, or even before 1939. Empire had rested on self-confidence and self-righteousness; Europeans had believed their superiority to be not only technical and military but also spiritual, racial, and moral. The horrors of the First and Second World Wars undermined such complacent arrogance and gave opponents of imperialism much greater influence in Europe. Increasing pressure from the United States, which had long presented itself as an enemy of empire despite its own imperialist actions in the Philippines and the Americas, encouraged Europeans to let go of their former colonies. Indeed, Americans were eager to extend their own influence in Europe’s former colonies — except when independence movements were led by Communists, as in Vietnam. Economically weakened, and with their political power and moral authority in tatters, the imperial powers preferred to avoid bloody colonial wars and generally turned to rebuilding at home.
Furthermore, the imperial powers faced dedicated anticolonial resistance. Popular politicians, including China’s Mao Zedong, India’s Mohandas Gandhi, Egypt’s Gamal Abdel Nasser, and many others, provided determined leadership in the struggle against European imperialism. A new generation of intellectuals, such as Jomo Kenyatta of Kenya and Aimé Césaire and Frantz Fanon, both from Martinique, wrote trenchant critiques of imperial power, often rooted in Marxist ideas. (See “Primary Source 28.5: Frantz Fanon on Violence, Decolonization, and Human Dignity.”) Anticolonial politicians and intellectuals alike helped inspire colonized peoples to resist and overturn imperial rule.
Around the globe, the Cold War had an inescapable impact on decolonization. Liberation from colonial rule had long been a central goal for proponents of Communist world revolution. The Soviets and, after 1949, the Communist Chinese advocated rebellion in the developing world and promised to help end colonial exploitation and bring freedom and equality in a socialist state. They supported Communist independence movements with economic and military aid, and the guerrilla insurgent armed with a Soviet-produced AK-47 machine gun became the new symbol of Marxist revolution.
Western Europe and particularly the United States offered a competing vision of independence, based on free-market economics and, ostensibly, liberal democracy — though the United States was often willing to support authoritarian regimes that voiced staunch anticommunism. Like the U.S.S.R., the United States extended economic aid and weaponry to decolonizing nations. The Americans promoted cautious moves toward self-determination in the context of containment, attempting to limit the influence of communism in newly liberated states.
After they had won independence, the leaders of the new nations often found themselves trapped between the superpowers, compelled to voice support for one bloc or the other. Many new leaders followed a third way, adopting a policy of nonalignment, remaining neutral in the Cold War and playing both sides for what they could get.