When the very natural human desire for retribution is not satisfied by the law, people will obtain retribution outside of the law. This is how you get people to

When the very natural human desire for retribution is not satisfied by the law, people will obtain retribution outside of the law. This is how you get people torn apart and burned by angry mobs. Civilization thus requires that the law act to satisfy that desire for retribution. Because the desire for retribution is nearly universal, we can tell that it is in our DNA. It clearly offers a selective advantage. It works. Retribution is the desire, but notice how it very effectively creates both deterrence (don't want to be torn apart by a mob) and incapacitation (can't commit crime after being torn apart by a mob). This is why it has the selective advantage. So, unless you want brutal violence as a system of justice, don't oppose making the criminals suffer. People need to see criminals punished, and they will take matters into their own hands as needed to ensure it happens.