But the primary purpose of justice is to punish criminal behaviors. We may want as a secondary goal to reduce recidivism but it cannot be at the expense of the primary goal. I strongly disagree with the idea that criminality is a form of mental disease and that prisons are just a sort of hospital to cure criminals.<p>For the same reason the severity of the sentence should be driven by the aversion of the society to the crime committed more than considerations on what will happen to the criminal after the sentence has been executed.