The United States has 5% of the world’s population, but 25% of the world’s prison population – and this nation holds more of its citizens in solitary confinement than any other nation, by a wide margin.

Atul Gawande, writing in the New Yorker, has a long and devastating article that carefully demonstrates that isolation is one of the cruelest forms of torture ever devised. He also marshals convincing evidence that isolating prisoners doesn’t even achieve the stated aims of its proponents. I’m lifting one of the less depressing sections, where he explores some of the alternatives, but I suggest you read the whole thing.

Is there an alternative? Consider what other countries do. Britain, for example, has had its share of serial killers, homicidal rapists, and prisoners who have taken hostages and repeatedly assaulted staff. The British also fought a seemingly unending war in Northern Ireland, which brought them hundreds of Irish Republican Army prisoners committed to violent resistance. The authorities resorted to a harshly punitive approach to control, including, in the mid-seventies, extensive use of solitary confinement. But the violence in prisons remained unchanged, the costs were phenomenal (in the United States, they reach more than fifty thousand dollars a year per inmate), and the public outcry became intolerable. British authorities therefore looked for another approach.

Beginning in the nineteen-eighties, they gradually adopted a strategy that focussed on preventing prison violence rather than on delivering an ever more brutal series of punishments for it. The approach starts with the simple observation that prisoners who are unmanageable in one setting often behave perfectly reasonably in another. This suggested that violence might, to a critical extent, be a function of the conditions of incarceration. The British noticed that problem prisoners were usually people for whom avoiding humiliation and saving face were fundamental and instinctive. When conditions maximized humiliation and confrontation, every interaction escalated into a trial of strength. Violence became a predictable consequence.

So the British decided to give their most dangerous prisoners more control, rather than less. They reduced isolation and offered them opportunities for work, education, and special programming to increase social ties and skills. The prisoners were housed in small, stable units of fewer than ten people in individual cells, to avoid conditions of social chaos and unpredictability. In these reformed “Close Supervision Centres,” prisoners could receive mental-health treatment and earn rights for more exercise, more phone calls, “contact visits,” and even access to cooking facilities. They were allowed to air grievances. And the government set up an independent body of inspectors to track the results and enable adjustments based on the data.

The results have been impressive. The use of long-term isolation in England is now negligible. In all of England, there are now fewer prisoners in “extreme custody” than there are in the state of Maine. And the other countries of Europe have, with a similar focus on small units and violence prevention, achieved a similar outcome.