As others have said, there are lots of divides in various cultures. From what I have heard, many people from the Americas look down on those from further south in the Americas. (Americans look down on Mexicans, who look down on Guatemalans, etc.) I've heard there are still certain views regarding Han Chinese versus others in China, xenophobia in Japan, sectarianism between subsets of Islam, and a basic level of nativism throughout much of the world. For America, the culture started with the era of 'scientific' racism so it started with a color divide. Those old divides remain because certain classes of people keep reinforcing because it helps their narrative. In the same way you can look at what happened with American healthcare through a Marxist, free-market-absolutist, or various other views, you can look at America through various lenses, and the racial one still holds a lot of sway. As long as enough people identify with the grouping, it grants political power to those who have authority in that group. The power is used to reinforce the identity to perpetuate itself and the cycle continues. It takes fairly drastic circumstances to change that.
Sunsofold
Popped open the article to find out, and the answer is neither. The 'milk' is crystals collected by cutting open a particular kind of roach and extracting them from its brood sack.
There's a phrase I didn't know I'd be using today.
What about a 360deg camera, where the target person is yourself, and anyone else captured is merely incidental/background?
Cigarette advertising was banned in the US. It famously increased profit because they didn't have to burn it all on advertising.
Advertising is like nuclear weapons. It's bad that it exists, harms people around it, and is only needed because the opposition has it. If it disappeared, everyone would benefit, but no one wants to be the first.
So, if you laid on a large enough block of it, you'd have the perfect shape to make a mold for a customized foam mattress?
In the current system, education isn't viewed as a system of societal improvement but as a product to improve the standing of the individual. Because the individual is seen as the only one who benefits from their education, the individual pays for it.