So are your 4 big American passport meme races. The Nazis even tried harder with it. I'm also still at a loss what the caucasus has to do with "white" people to that specific degree, it informs the moniker in the U.S. I'm not informed on it, but isn't that from some bullshit 19th century "theory" which the ran with? And I still don't get why the sudden race sperg, I thought I would be more interesting to discuss, if a race identity really is the building block of culture at all, there's lots of peoplewith highly variedbackgrounds collaborating on art works nowadays. It would actually be interesting to which degree, looking similar was necessary for the first tribes to form, for example, because now it looks like that just being human in general suffices or is that modern coherence actually the result of culture?
The four major races are Caucasoid/Mongoloid/Negroid/Australoid. This is pretty widely known, Some would add a fifth being "Amerindian" which i personally don't think holds weight as they bridged the gap from Asia and are found to be closely related to Mongoloids. In regards to the name, irc the name Caucasoid/Caucasian came about from the oldest human remains that matched with that of what we know about modern day caucasians came from the Caucaus mountains. Thus the name stuck. Each race has different bone structures and races can be determined from skeletons, Forensics are able to determine the age, sex and race of the deceased by bone structure alone. And no, i am not referring to phrenology here.
The four major (base) races have never been debunked. If you can find a convincing study that discredits the idea then i will look into it, but every one i have ever come across in the past seems to contradict itself and push the whole "there is only the human race" narrative.
EDIT: Ah, i didn't see you had edited your comment a couple of times. Firstly i am not sperging, i am simply stating that race absolutely has an effect on forming cultures. Race isn't just skin colour, it is ignorant to think like that. And regarding your comment about tribes, early humans were known to stick to their own, they were highly territorial and would only tend to migrate if food sources were scarce or they were on a path of conquest for land/women etc. I am speakly mainly of the early humans in what is modern day Europe and Northern Asia here. And to your question about why do some people seek out contact with foreigners whilst others are more isolated, well that depends.. it can be down to curiosity, a great example would be the age of exploration.. setting out to find and document new lands, peoples, and resources was seen as very prestigious (and often financially beneficial) to themselves, their companies and their nations, it could be down to necessity, maybe there is a famine in their native lands, or conflict.. so they are seeking greener pastures so to speak.. or perhaps, they are just a solitary people in general and their curiosity is stonger than their fear. You have to give me a timeline for this, because if you are speaking about the modern age then it's a very different story.
Also please try to ask one or two questions at a time and not edit your posts to ask more questions please.