Following that idea, the scientists created the law of urban scaling. Although some argue against its viability, it may be able to predict a city's sustainability, status, and future potential ... along with little things like the nature of a city's electrical cables and, oh, its residents' income.
Somewhere out there, a scientist is working on a theory that can predict how much money you have in your pocket based on how elephant biology works. So you better eat up if you know what's good for you, you tusky son of a bitch.
Trade And Gravity Follow The Same Rules
Capitalism is the closest thing the Western world has to a common language, even if most of what it says is "Fuck you, buddy." There are tons of books about trade and its inner workings, usually written by men in designer suits and smiles that seem like they belong under a triangular fin. Not that you really need to bother with any of those, though. A fellow called Isaac Newton already wrote the definitive guide on the subject in the 17th Century. Oh, he may have called it "gravity," but don't be fooled. The dude was a hedge fund bro genius in disguise.
He owned, like, so many shares of Apple.