Why should society be concerned with rehabilitating the most violent of offenders? To be a bit more specific, assume we are talking about a parent that has brutally beaten their child to death, or someone who has knelt on someone else's neck until death was inevitable. This person has killed someone, an action that is absolutely irreversible. Why should that person be allowed back in society? I don't want society spending time and money rehabilitating this person. In my opinion, this person has forfeited their right to live in society when they chose to take someone else's life.

To be clear, I'm not talking about non-violent crime or even most types of violent crimes - I'm referring to the most violent of offenders. There are 7 billion people in this world, I think society will carry on just fine if we remove the tiny fraction of people from society that commit the most heinous of violent crimes (i.e wanton murder).

So what's society get out of rehabilitating this person? Let's assume this person can add moderate value to society, such as being capable of working an average job decently well (thus bringing value to their employer, the customers they help, and greater society through taxes). Now weigh that value added against the fact that their victim will never re-enter society again. Is that value added worth it, and is it fair to their victim?

I am open to having my opinion changed on this topic so if you have a good argument for why we should be concerned with the most violent offenders, please do share and I will weigh what you say carefully. However, please make sure you are addressing the case of deliberate, unprovoked murder since my response is only addressing this form of crime.