I haven’t done research into that, specifically, but it’s a really good question. I don’t think there is a society that has a mix of people (skin tone wise) that doesn’t. Once the colonialists took up their project of creating race as a delimiter, it spread as fast as their evil. Can a modern society function without race as a marker of value? Of course it can. Race has no purpose other than to delineate who is on the bottom, who’s on top and who is in the middle of the ladder where the top represents power and value and the bottom represents neither. However, this structure is not just because of a top-down approach or systemic racism. As we know, or at least as some of us know, many ethnic groups (here in the US) take up certain ‘ethnic projects’ where they make attempts to move up the racialized ladder by distancing themselves from the bottom and looking to whiteness as an example. To put it another way, race is a construction supported both by racist people and by people who are affected by racism but still reinforce it.