the greatest deterrent was the certainty of detection: the more swift and certain the punishment, the more effective it would be. It would also allow a less serious punishment to be effective if shame and an acknowledgement of wrongdoing was a guaranteed response to society's judgment. Thus, the prevention of crime was achieved through a proportional system that was clear and simple to understand, and if the entire nation united in their own defense. His approach influenced the codification movement which set sentencing tariffs to ensure equality of treatment among offenders. Later, it was acknowledged that not all offenders are alike and greater sentencing discretion was allowed to judges. Thus, punishment works at two levels. Because it punishes individuals, it operates as a specific deterrence to those convicted not to reoffend. But the publicity surrounding the trial and the judgment of society represented by the decision of a jury of peers, offers a general example to the public of the consequences of committing a crime. If they are afraid of similarly swift justice, they will not offend. Bentham In this context, the most relevant idea was known as the "felicitation principle" of utilitarianism, i.e. that whatever is done should aim to give the greatest happiness to the largest possible number of people in society. Bentham argued that there had been "punishment creep", i.e. that the severity of punishments had slowly increased so that the death penalty was then imposed for more than two hundred offences in England. For example, if rape and homicide were both punished by death, then a rapist would be more likely to kill the victim (as a witness) to reduce the risk of arrest. Bentham posited that man is a calculating animal who will weigh potential gains against the pain likely to be imposed. If the pain outweighs the gains, he will be deterred and this produces maximal social utility. Therefore, in a rational system, the punishment system must be graduated so that the punishment more closely matches the crime. Punishment is not retribution or revenge because that is morally deficient: the hangman is paying the murder the compliment of imitation. But the concept is problematic because it depends on two critical assumptions: if deterrence is going to work, the potential offender must always act rationally whereas much crime is a spontaneous reaction to a situation or opportunity; and if the system graduates a scale of