But the fact is that the really good and intelligent science fiction stories are almost never filmed because not suitable for mass production. Really good science fiction stories that were filmed at the same time, the absolute rarity.
But here we have one of the smartest science-fiction films of recent times! I do not know if there is a novel so. In fact, I stumbled completely random about this movie and have viewed it to me. My conclusion: Brilliant movie.
The film is hard to categorize. I even understand it as a parable that reveals with comic, even parodic means the stupidity of racism.
The movie goes even further. The fact that he plays in South Africa, I can not help to refer him to the apartheid. The film will probably say that racism is not a property of a particular human race (in this case, probably the whites), but of all races and origins of the people is represented across. It represents racism as a human characteristic. And I think he has so right.