According to the "deterrence theory," we are all latent killers, and the death penalty is inevitable. It not only kills the killer, but also kills the idea of ¿¿killing in others. It's as if humans would suddenly turn into monsters if we abolished the death penalty! We might agree with this "if human nature were different," but humans are not controlled by just one idea or one energy. They are a stage for conflicting forces, clashing energies, various fluctuations, and sudden shifts, even within themselves. Some murders occurred suddenly due to a tense situation, and their perpetrators never expected that they might one day kill. For example, no one can retain the sight of a severed head dripping with blood in their memory for the rest of their lives, especially after executions retreated from public squares to secret prison yards, even though one of the conditions for the effectiveness of the "deterrent example" of the death penalty is that it be public!