 How does the CPA prevent crime?
A civilization weary of murder, robbery, kidnapping, counterfeiting, blackmail, rape, arson, and drunkenness had originated the CPA—Crime Prevention Association. There were no longer any prisons—CPA officials had declared loudly and emphatically that their job was to prevent crime, not punish it. The CPA system was, actually, cheaper than previous methods because it did away with the damage caused by countless crimes; did away with prisons and their guards, large police forces, squad cars and weapons. And if the conspirators were prevented from committing a crime, then that meant the CPA had functioned properly once again. That meant the CPA had once again prevented crime, and the CPA didn't punish crimes or attempted crimes, and it didn't attempt to prevent crimes by punishment.
 The CPA prevents crime using constant surveillance, subliminal messaging, public shaming, and various psychological treatments, including lobotomy.
 The CPA prevents crime with brain implants that suppress the criminal nature.  The CPA prevents crime with large police forces, squad cars, and weapons.  The CPA prevents crime through the use of psychological warfare.  The CPA prevents crime using constant surveillance, subliminal messaging, public shaming, and various psychological treatments, including lobotomy.