Prosecution of serious crimes which are worthy of international concern were few and far between before the initiating of the International Criminal Court in 2002. Fifteen years later, there are still concerns. The United Nations International Law Commission's Working Group on the Obligation to Extradite or Prosecute submitted its own report on the issue in 2014, which has led to numerous, as of yet unanswered, questions. How far are states under an obligation to extradite criminals who shock the world? Are State officials immune from foreign criminal jurisdiction? How can we enforce universal jurisdiction? And what happens when there are competing rules regarding the surrender of persons to a competent international court? Written by the Chairman of that very Commission, Kittichaisaree provides a guide to the final report, offering an analysis of the subject and a unique summary of its drafting history. Authoritative, encyclopaedic, and essential to those in the field, The Obligation to Extradite Or Prosecute critiques the status quo and offers practical solutions as to the road ahead.