At a justice conference ten years ago, a United Church of Christ minister invited me to step inside a solitary confinement cell replica. I hesitated, claiming claustrophobia. The minister, Ron Stief, assured me that he’d let me out in a minute. Once inside, with the solid metal door of the windowless cell sealed shut, I stood in the overly bright artificial lighting and wondered how a person in that cell could know day from night. How could...