Skill improves with experience. An experienced artist may be able to paint with one quick line something that would previously have taken a whole canvas full of brushstrokes. This is an individual process, but it happens in society as well. Social systems also become more efficient with increasing experience.1 A shepherd with a dog, a fence, and an ATV can control more sheep of the sort bred to respond to those tools with less effort than could ever have been done without them. They’re all elements in a social system.2
Policing in the United States is also a social system, founded in the need to control enslaved human beings. The very visibility of the horrors of slavery, the constant terrorism required to hold human beings in bondage, was a weakness in the system. The enslavers’ legal technology didn’t constrain their brutality towards their victims, so any systemic restraint must have gone towards stability. Isolation of slaves was one solution to this problem, a solution adopted by England with the 1833 Slavery Abolition Act, which kept slaves out of sight in the Americas even as the blood soaked money continued to pour into the treasury.