Prison administrators and inmate advocates agreed last week on one facet of the debate on solitary confinement: Prisons need to be more careful about putting people in “the hole.”

On Tuesday, California agreed to end its unlimited isolation of certain prisoners, including setting limits on the practice, which will result in hundreds being moved back into the general prison population. Jules Lobel, a University of Pittsburgh law school professor who is also president of the New York City-based Center for Constitutional Rights, was the lead attorney for inmates in their lawsuit against the country’s largest prison system.

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