Wouldn't inbreeding cause the <i>opposite</i> of a super-race? Inheriting different genes from both parents can prevent a lot of problems; for example the fact that women have two copies of the X chromosome makes them a lot less likely to be color blind. Having a uniform gene pool means that people would end up with similar genes and be more likely to have diseases.<p>I'm not sure if/why recombining after a long period of isolation and mutation would be better than staying together and just sharing mutations gradually. It's an interesting question though, there's problem some research paper somewhere that could tell us...