I recommend Chis Beckett's Dark Eden
It's about a small community of humans, who are all the descendants of two humans who got stranded on an alien planet. The book focuses mostly on the social forces in a small community, the power of myths and gender relations, and the dynamics of power relations and the battle between the conservative mindset and the explorative/inventive mindset.
I thought it was a really interesting and captivating novel. The people in the book know more or less where they come from, so the story isn't about them discovering that (which would have been boring, as the reader aleady knows). Their thinking is therefore not entirely tribal, even if their living conditions are kind of primitive. Their situation is easy to relate to and you don't need to get annoyed at their ignorance, because they are aware that they know less that their Earth ancestors did.
Oh, and the planet is bloody cool.