This paper attempts to justify punishment on the grounds that it is a benefit to the person being punished. I accept the basic premise of a previous theory of punishment, the Moral Good Theory (MGT), which states that we cannot harm anyone. Thus, punishment can only be justified if it is not a harm. The MGT claims that punishment is beneficial in that it provides a moral education to the offender. I I reject the idea that punishment is morally educational and instead propose a new theory which revises and strengthens the MGT, accounting for its flaws. This new theory, the Social Good Theory, argues instead that punishment is beneficial because it allows a criminal to be reintegrated into society.