Defining an International Crime: Historical and Contemporary Developments

Despite the desirability of the identity of crimes being specific, the category of conduct constituting international crimes remains blurry. In consequence, the controversy over what is, or is not, an international crime has continued to rage on. Different criteria have been used to classify a specific conduct as an international crime. As a source of authority, some authorities point to the works of scholars, treaties, legal systems, the statutes of international criminal courts, or even works of the International Law Commission, to identify an international crime. Nevertheless, unanimity in identification remains elusive. Thus, this article examines differing perspectives on the constituents of international crimes. The analysis is relevant because the definition of crime forms the bedrock of international criminal justice. However, the paper finds that leaving the category of conducts constituting an international crime open, facilitates the inclusion of other grave or emerging forms of criminality, which may also rise to the threshold of the crimes within the jurisdiction of international criminal tribunals. Although this may appear advantageous, the need for predictability, consistency and uniformity in the categorization of an international crime cannot be overemphasized