For many decades, the civilized world has recognized prolonged isolation of prisoners in cruel conditions to be inhumane, even torture. The Geneva Conventions forbid it. Even at Abu Ghraib in Iraq, where prisoners were sexually humiliated and physically abused systematically and with official sanction, the jailers had to get permission of their commanding general to keep someone in isolation for more than 30 days.

So Americans should be disgusted and outraged that prolonged solitary confinement, sometimes for months or even years, has become a routine form of prison management. It is inflicting unnecessary, indecent and inhumane suffering on tens of thousands of prisoners.

The issue came to the fore most recently because of a three-week hunger strike by inmates at Pelican Bay State Prison in California near the Oregon border that began on July 1 in the Orwellian Security Housing Unit, where inmates are held in wretched isolation in small windowless cells for more than 22 hours a day, some for many years.

Possessions, reading material, exercise and exposure to natural light and the outside are severely restricted. Meals are served through slots in steel cell doors. There is little in the way of human interaction. Returning to the general prison population is often conditioned on inmates divulging information on other gang members, putting themselves in jeopardy.