all guilty people deserve to be punished in proportion to the severity of their crime
justice requires people to suffer for their wrongdoing
often supported by lex talionis
objections include its vengeance, not retribution making it morally dubious, anticipatory suffering makes it more severe and retribution is just a reaction to an emotion
rehabilitation
capital punishment doesn't rehabilitate and return to society, however the time before execution is used for repentance and spiritual rehabilitiation
aquinas - rehab before the next life
deterrence
deter potential murderers from killing people
prevent reoffenders
those who are executed cannot commit further crimes
cases of those escaping and killing again are extremely rare, but still a danger to prison staff and inmates
not sufficient enough - other ways like no parole
closure and vindication
death penalty provides closure
flimsy. every family acts different
christian perspective
old testament is all for death penalty, but the context is important. life was hard for the hebrews as they were just freed from slavery and wandered the desert 40 years, society moved frequently and struggled to survive - prison was impossible
new testament - we are all sinners and dont have the right to pass judgement on one another (let anyone among you who is without sin to be the first to throw a stone at her)