The title comes from a speech by Wilson, in which the President of the United States declined to enter the First World War on the side of the United Kingdom and France. Devlin's book is - apart from being a superb panorama of the times - the best analysis of a legal and philosophical mind at work on the problems on international relations. Wilson was a natural pacifist; but he went to war in the end. Devlin's book, more acutely than any other, tells us why.
It should be required reading for our politicians today.