Question: What justifies punishing people for committing crimes? In your 2006 graduate paper, "The Scope Problem in Punishment," you criticize utilitarian theories of punishment that aim for deterrence of future crimes on the grounds that they don't punish all and only those who are guilty. Yet why is that a problem? Moreover, why should a criminal be punished if doing so won't have any future benefits, such as deterring future crimes? Doesn't self-interest require that actions have some future benefit – and if so, shouldn't all punishment have some positive future effect like deterrence?