We all know that the different races were formed from isolation. If the races had been isolated for an even longer period of time, we would have formed what could be considered as different species. Take Chinese/Japanese people for example. If it had some sort of advantage to have more oval shaped eyes then over the course of a few hundred thousand years they might have developed eyes that were almost shut and stretched almost from one ear to the other. That could develop even more to add more skin to the side of the head. This would make them look VERY different from the rest of the world and they would have probably been considered a different species. African Americans were once considered to be not human to the early settlers that came to America (and sadly they weren't treated as humans either). Why? Well because their skin color was so DRAMATICALLY different than the settlers that they weren't considered human. The same would have happened to Chinese/Japanese people if the radical adaption that I described above had taken place. Eventually with enough isolation, you don't just look like another species, you BECOME another species, one that is no longer genetically compatible with the species that you originated from. If the human race actually invented transporter technology like you see on Star Trek, there would be no more Germans, Chinese, Spanish, African American, or any other races. We would all mix and look pretty much the same over the course of a few thousand generations. Just as we can all become one species, one species can become many different kinds. Did you know that the blue whale and the gray wolf were once the same species? There was a news report a while back about a tiger and a mountain cat mating and actually having an offspring. It didn't live very long, but if you put a bunch of mountain cats and tigers on an island and waited a few million years, you would come back and see that there was neither of them living there anymore. Instead, there would be an entirely new kind of dangerous feline that you've never seen before. It wouldn't look much different from either of them but it would have a different genetic makeup and would be totally different in personality, adaptions, and traits. I can totally see this happening in the Great Valley. It would probably happen in LBT 1,520,402,349,104 but it will still probably happen one day.