At the beginning of his speech, Mandela mentions “an extraordinary human disaster.” What is the “glorious………human achievement” he speaks of at the end?

At the beginning of his speech, Mandela mentions “an extraordinary human disaster”. It was the policy of apartheid in South Africa under which people were the victims of racial discrimination. Now they had achieved freedom. The “glorious………….human achievement” he speaks of at the end is that they will never be oppressed on the basis of their skin color.