Chapter 8 concludes the book by reviewing its arguments and conclusions, identifying weaknesses in the methods used, and proposing ways in which these might be addressed and the research developed further, for example by involving participants in other countries. The chapter importantly notes that uncertainty and contestation remain marginal problems in the jus ad bellum, as in most areas of international law. In most cases, the requirements of international law governing resort to military force are clear and uncontested. There are many reasons to believe that the contemporary jus ad bellum has contributed to global peace and stability. This book’s examination of legal and factual uncertainty and extra-legal intuitions seeks to support and assist lawyers and states in their mission to uphold and apply this crucial area of international law, not to encourage lawyers or states to undermine or abandon it.