This book considers the extent to which States are held accountable for breaches of jus cogens norms under international law. The concept of State accountability is distinguished from the doctrine of State responsibility and refers to an ad hoc practice in international relations that seeks to ensure States do not escape with impunity when they violate norms that are considered fundamental to the interests of the international community as a whole. State Accountability under International Law sets forth a definition of State accountability and establishes a threshold against which the...