In The Fog of Peace, Jean-Marie Guéhenno reflects on some of the most difficult questions facing international interventions today. Guéhenno draws on his experience as the head of the United Nations Department of Peacekeeping Operations from 2000 to 2008, a period that included intense negotiations and spiraling crises in Afghanistan, Iraq, and Sudan. He returned to the United Nations in 2012 to act as Kofi Annan’s deputy in negotiations designed to find a—so far elusive—sustainable solution to the war in Syria.