Depends on what you think "the races" are and where the dividing lines are doesn't it. For the most part it's going to be done by visual appearance isn't it. I don't really see what's interesting about this question. I think you have the cart before the horse here. But anyway, as I've said, I think "race" is just an attempt at recognising and classifying actual real observable differences. Humans like to classify things. If the real differences are there (which they are) then that's reason enough for classifications to exist. There doesn't have to be any benefit. Well people don't generally go around measuring other people, so that's perfectly understandable, hence my answer to the first question. I'm sure if someone with 50% Polynesian ancestry essentially looks "white" then that's probably how most people are going to see them, at least initially. I don't know about you though, but if they were then to tell me that they are actually 50% Polynesian, I wouldn't ignore it and insist they were white. I just mean that in your example you were talking about (apparently) someone of 50/50 mixed race, yet said "but that one drop of blood". I was just saying that it sounded like more than one drop of blood. Unless you think that people only have two drops of blood in them I suppose. It wasn't an important point however. Well as I said, I can see why someone like Obama tends to be seen as "black" in a majority white country, for obvious reasons. I don't know if that holds true universally however, and I also think most people are able to comprehend that he is mixed race. I certainly don't think that someone of white/black mixed race is more black than someone of white/Polynesian mixed race is Polynesian though. Hope that helps. I don't really know what you're asking me here, if anything. Edit: I'm sure I haven't really answered you properly, so sorry for that, but I doubt this is going to actually go anywhere as it never does. And 6 pages have popped up in the few hours I've been away which I can't be bothered to read so I think I'm just going to leave it here. If you want to ask me more feel free to PM me but I probably won't see it if you ask in this thread.