27 April 1994,
Nelson Mandela won the elections in South Africa. They were the first elections in the country without racial discrimination, and after 27 years in prison, Mandela and his African National Congress were imposed. Believing that, in the middle of the twentieth century, decolonization processes could put an end to white superiority, they developed a segregation system in South Africa called apartheid. Its decline began in the early 1990s.
Source:
Josep Fontana, for the sake of empire. A history of the world since 1945 (Ed. Past & Present).