We tend to think of price as innate. A can of Coke is red. It’s 12 ounces. It costs a dollar. The price doesn’t go up or down when we’re thirsty. It stays fixed.
People didn’t used to think about prices this way. The price tag wasn’t even invented until the 19th century; for most of human history, we haggled.
Today on the show, the life and death of the price tag.