"Torture is banned because it is cruel and inhumane. But as Shane O'Mara writes in this account of the human brain under stress, another reason torture should never be condoned is because it does not work the way torturers assume it does. In countless films and TV shows such as Homeland and 24, torture is portrayed as a harsh necessity. If cruelty can extract secrets that will save lives, so be it. CIA officers and others conducted torture using precisely...