Free markets, free elections, and peaceable relations among sovereign states are the “Wilsonian triad”, three inter-locking proposals made by Woodrow Wilson in his failed attempt to establish the League of Nations on a sound footing. Mandelbaum’s thought-provoking case is this: the trio did eventually succeed in defeating all comers, at least to the point where they have hegemonic, if not universal, status with no credible alternatives in sight.