Following the Second World War, far-reaching social, economic and political changes profoundly affected a number of areas where Ismāʿīlīs resided. In 1947, British rule in the Indian Subcontinent was replaced by the sovereign, independent nations of India, Pakistan and later Bangladesh, resulting in the migration of millions people and significant loss of life and property. In the Middle East, the Suez crisis of 1956 as well as the preceding crisis in Iran, demonstrated the sharp upsurge of nationalism, which was as assertive of the region's social and economic aspirations as of its political independence. Africa was also set on its course to decolonisation, swept by what Harold Macmillan, the then British prime minister, termed the "wind of change". By the early 1960s, most of East and Central Africa, where the majority of the Ismāʿīlī population on the continent resided, including Tanganyika, Kenya, Uganda, Madagascar, Rwanda, Burundi and Zaire, had attained their political independence.