Two centuries ago, solitary confinement was considered a humane reform, promoting reflection, repentance — penitence; hence penitentiaries — and rehabilitation. Quakerism influenced the design of Philadelphia’s Eastern State Penitentiary, which opened in 1829 with a regime of strict solitude. In 1842, Charles Dickens visited it:
“I hold this slow and daily tampering with the mysteries of the brain, to be immeasurably worse than any torture of the body: and because its ghastly signs and tokens are not so palpable to the eye and sense of touch as scars upon the flesh; because its wounds are not upon the surface, and it extorts few cries that human ears can hear; therefore I the more denounce it, as a secret punishment which slumbering humanity is not roused up to stay.”
Eastern State Penitentiary is worth a visit if you're ever in Philly. It's a museum now.
It was built with good intentions. A more humane prison, where prisoners could reflect on their crimes. And then all the prisoners would lose their minds.