How does retributive justice explain why offenders should be punished?

Retributive justice posits that punishment is a moral necessity, grounded in the principle that offenders must make amends for the harm they have caused to society. This philosophy is rooted in the concept of lex talionis, or the law of retaliation, which dictates that the severity of a punishment should be directly proportionate to the gravity of the offense.123

Under this framework, punishment is justified for several key reasons:

• Moral Accountability: Punishment is viewed as something offenders "earn" when they exercise their free will to commit a crime. It is considered improper to allow guilty individuals to go unpunished, as they have gained an unethical advantage over law-abiding citizens by misusing society's benefits.2
• Restoring Balance: By imposing consequences, the state removes the offender's unfair advantage and attempts to restore social balance.2
• Validating Values: The legal process serves as a concrete example of society’s values, reinforcing what is considered appropriate conduct.1
• Satisfying Justice: Punishment addresses the community's demand for justice and helps prevent victims from seeking personal vengeance.1

Retributionists strictly require that punishment be imposed only on those who possess mens rea (a guilty state of mind) and have committed an actus reus (a guilty act), ensuring that only the truly culpable are penalized.2