F. W. DeKlerk was the last head of state of south Africa in the apartheid era. Shortly after he became president he called for a non-racist south Africa to come into being . He also lifted bans on the ANC (African National Congress) and the Communist Party of South Africa and promised to release the anti-apartheid revolutionary Nelson Mandela. After his release, the men united to give rise to the first multi-racial elections in South Africa, in 1994. The two men are credited with helping to end apartheid.
Read about the negotiations here.