Rewrite the second sentence in each pair, providing an effective transition and clarifying any cross-references.

As satisfying as it may be to punish wrongdoers, the real impetus behind tough sentencing laws is the belief that they actually deter crime. 

The treatment so many prisoners receive in state and federal penitentiaries, including humiliation and loss of autonomy, only exacerbates any short or long-term psychological issues that make them susceptible to antisocial and criminal impulses, according to evidence.