In this book, Boaz Atzili argues that the process of state building has long been influenced by external territorial pressures and competition, with the absence of border fixity contributing to the evolution of strong states—and its presence to the survival of weak ones. What results from this norm, he argues, are conditions that make internal conflict and the spillover of interstate war more likely. Using a comparison of historical and contemporary case studies, Atzili sheds light on the relationship between state weakness and conflict. His argument that under some circumstances an international norm that was established to preserve the peace may actually create conditions that are ripe for war is sure to generate debate and shed light on the dynamics of continuing conflict in the twenty-first century.