By August of 1916, the combatants in the First World War had been locked in struggle for two years. While the German Empire had enjoyed astonishing and unexpected success on the eastern front, on the Western Front things were very different. The German plan to bleed the French Army dry at Verdun had begun in February, and had months of further futility and agony to go. The Allied attempt to break the German lines along the River Somme had begun on July 1, and would go on to November, with increasingly marginal and catastrophic results. If ever there was a time for both sides to consider a peace settlement, the autumn of 1916 was it.

As Philip Zelikow argues in his new book The Road Less Traveled: The Secret Battle to End the Great War, 1916-1917, the possiblity of peace was much more substantial than has been generally realized. The failure to achieve it would have consequences that are almost too many to categorized, and provides us today with profound lessons. Philip Zelikow is White Burkett Miller Professor of History and J. Wilson Newman Professor of Governance at the University of Virginia. A past director of the Miller Center at UVA, he was also Executive Director of the 9-11 Commission.