Ms. Linfield is a journalism professor and the author of “The Cruel Radiance: Photography and Political Violence.”
I know that stoning people to death is barbaric. But I never understood just what it entails — the slow, cruel process by which a defenseless human being is degraded and destroyed — until I saw a series of photographs taken by Somali photojournalist Farah Abdi Warsameh, which depict the stoning execution of a man accused of adultery by the insurgent group Hizbul Islam. While some charge that viewing such pictures is voyeuristic, these images made me face the terror, the blood and the sheer cruelty of this practice — one that, astonishingly, has not yet been tossed into the dustbin of history.