Luckily I did not say that. Retribution and deterrence are very different concepts and objectives. However, most retributive actions also happen to have a deter

Luckily I did not say that. Retribution and deterrence are very different concepts and objectives. However, most retributive actions also happen to have a deterrent effect. Ie, sending someone to prison as retribution, will also have a deterrent effect on other would-be criminals. This is an empirically verifiable claim with many supporting studies that you can find via a quick google search.