Norm conflicts in international law have received surprisingly little attention, given their fundamental relevance for law in general and the present international legal order in particular. Long ago, a few pages in Emer De Vattel’s Le droit des gens, published in 1758 (De Vattel 1758: 507-514, and an article by C. Wilfred Jenks titled “The Conflict of Law-Making Treaties”, published in 1953 (Jenks 1953), would have nearly completed the list of references for a discussion of this serious and utterly important problem of norm conflicts. The recently published book by Valentin Jeutner named Irresolvable Norm Conflicts in International Law: The Concept of a Legal Dilemma (Jeutner 2017) finally puts an end to this intellectual drought.