Core concepts and base theories of the criminal justice system. Movement to bring about the reform of the criminal justice system of. Only the legislator has the authority to make the laws. Only laws, in turn, can set the punishment for crimes. Means judges can only determine guilty or not guilty. Humans are both rational and possess free will. Punishment should be based on the social harm of the act and not on the intention of the offender. Punishment should fit the crime and not the criminal. To prevent crime, punishment should only be just severe enough for the pain or unhappiness created by the punishment to outweigh the pleasure or happiness obtainable from the crime. Specific deterrence - deters criminal from committing future crimes. General deterrence - general public deciding on committing crimes will see that costs outweigh benefits and decide against committing crimes.