If you treat prisoners well, they will be less angry, less inclined to violence inside prison, less likely to provoke violent actions by guards, less likely to have reason to file brutality lawsuits that cost taxpayers a bundle and waste administrators' time. And most important, well-treated prisoners will be less likely to leave prison angrier, more vicious and more inclined to criminal behavior than when they went in.
Crimes lead one into another; they who are capable of being forgers are capable of being incendiaries.
Those magistrates who can prevent crime, and do not, in effect encourage it.
The object of punishment is prevention from evil; it never can be made impulsive to good.