What metaphors are used in Six Degrees of Separation by John Guare?

In Section Three, Paul explains that his father once took him to South Africa when he was making a movie. Paul discusses the part of the movie where the camera shifts from riots in the streets to a beautiful villa where people are sitting on a terrace picking at their lunches. Paul then admits to having told his father that he didn't understand this part of the movie. After which, his father explained that it was a metaphor about the blacks in South Africa..... who were completely uneducated, yet took over the governing of their country in 1976 at the time of the Soweto riots. Paul concludes that the theory that people who have bad childhoods (as these South Africans did) and cannot function must not be true.