I will admit however that I have not liked the trend in modern fantasy (both games and movies/TV) to just pepper people of color around without really any context/explanation. The modern era - with people of very different looks all jumbled together - is a historical aberration. Traditionally speaking if a society is not racist, people intermix freely with one another, and in a few generations everybody looks pretty much the same again.
It's one of those examples of when people (mostly white Americans) want to "combat" racism by counter-intuitive enforcing real life American norms that only came to be in real life because of historically unusually extreme racism and xenophobia. It's pretty much a "separate but equal" fantasy that white Americans want to enjoy.