HR presentation proposal

I'm interested in Nelson Mandela and how he managed to united a country that had a very long history of extreme racial segregation. Mostly watching Invictus caused me to be interested in this, but then even just reading half of the Wikipedia article was really fascinating. Other than that I haven't really done much research yet. My questions mainly concern the technicalities of the issue, as I think I only really managed to get up to the 1950s in the Wikipedia article, so I will want to read more on the topic.