Decisions of international courts and arbitrators, as well as judgments of national courts, are fundamental elements of modern public international law. The International Law Reports is the only publication in the world wholly devoted to the regular and systematic reporting in English of such decisions. It is therefore an absolutely essential work of reference. Volume 178 is devoted to the 2017 judgment of the United Kingdom Supreme Court in Rahmatullah v. Ministry of Defence and the Foreign and Commonwealth Office (No 2); 'The Iraqi Civilian Claimants' v. Ministry of Defence and Foreign and Commonwealth Office; Mohammed (Serdar) and Others v. Ministry of Defence, the 2017 judgment of the United Kingdom Supreme Court in Al-Waheed v. Ministry of Defence; Mohammed (Serdar) v. Ministry of Defence, and the 2017 judgment of the United Kingdom Supreme Court in Belhaj and Boudchar v. Straw and Others; Rahmatullah v. Ministry of Defence and the Foreign and Commonwealth Office (No 1).