> it's Haves vs Have Nots - the only two classes

Then what do you call it when the Haves trend light in skin tone and the Have Nots trend dark in skin tone?

It's definitely more nuanced for sure. Factors that can play into it can include but aren't limited to race, social standing and class, country that you are living into etc. I agree there's a have vs have nots at play at times but I don't think you can discount race at play either.

As an example, I always found it interesting that when I moved to the US, I found the words use suddenly disappears despite there being lots of people that could fit that mold. Has anyone experienced otherwise? I'd be curious to know