I was in prison, and you came unto me. Verily I say unto you, inasmuch as ye have done it unto one of the least of these my brethren, ye have done it unto me.
~(Jesus Christ) Matthew 25:36, 40
I can tell you this on a stack of Bibles: prisons are archaic, brutal, unregenerative, overcrowded hell holes where the inmates are treated like animals with absolutely not one humane thought given to what they are going to do once they are released. You're an animal in a cage and you're treated like one.
No written law has been more binding than unwritten custom supported by popular opinion.