(Just so that we're clear, I'm talking about humans, not the aliens) This is what I think about racial issues in a sci-fi universe: Depending on how far into the future it's set, it's possible that racial issues are no longer a thing. It could be possible that by that time, the concept of class and who's better than who has gone away. Still, human nature. It's natural for a human to think he/she is better, even more supreme than someone else for whatever reason. While someone, say a crewman, won't actually voice displeasure for risk of loosing his/her job, they may do subtle things such as slacking off on duties, neglecting to do certain things, or even 'forgetting' to look the captain in the eye or saluting. Even in today's world, there are still racial tensions even though, thankfully, it's no longer legal to segregate people due to race. (well, as far as I know, really...) As for sex issues. By sex issues I mean gender. Again, for the most part, we live in a world where men and women are seen as equals. We're no longer in the era where it was acceptable to tell the women they couldn't do anything but housework. Could those same issues exist in a sci-fi universe? In my opinion, I think so. If anything else, human nature will endure. People, even if it's just small groups, will still think they're better than others. Thoughts?