Why is the South African Constitution called the finest constitution of the world?

When South africa gained independence, the black people decided to forgive the attrocities of the whites and decided to include them too in their independent country. So the constitution which was formed for South africa did not exclude the rights of the whites. The constitiution was formed keeping in mind the rights of blacks and whites both. Hence the constitution of south africa is called one of the finest constitutions of the world were the oppressed (those who suffered the attrocities) and the oppressers (those who committed attrocities) both were living in harmony.