In 2014, the International Law Commission (ILC) began drafting articles for a Convention on the Prevention and Punishment of Crimes Against Humanity, alluding to “a global convention on crimes against humanity”. While the consideration for this is well-founded, one is compelled to consider the already existing international law on crimes against humanity as formulated under the Rome Statute (Article 7). One goal of the ILC in its crimes against humanity convention was to produce a balanced text that would inspire States to establish improved national laws and national jurisdiction regarding crimes against humanity (and develop inter-State collaboration on the subject), while respecting certain boundaries on what States would likely accept in a new convention. From one perspective, the ILC could have adopted a far-reaching treaty language crammed with “wish list” items to describe highly progressive legal policy, but States likely wouldn’t adopt such an instrument.
It is general consensus that crimes against humanity have attracted sufficient adherence to by States (opinio juris and State Practice) such that they have crystalised as customary international law as well as being contained in the Rome Statute. However, Sean Murphy highlights many States that will not prosecute or extradite alleged perpetrators solely based on customary international law. Rather, they will insist upon having a national statute to prosecute. To bridge this lacuna of international and national law, a crimes against humanity convention will oblige States to codify the crime within their national law, thus enabling themselves to prosecute criminals. In creating its draft articles on the convention on crimes against humanity, the ILC may have merely adopted “guidelines,” “principles,” or “conclusions” that would not bind States to legal restrictions. Instead of a legally binding treaty, the ILC aimed for practical, achievable, and valuable suggested articles.
According to Murphy, unless and until a convention on crimes against humanity is created, States will not take cognisance of their actions. Murphy argues that States must create a treaty and not just a “draft” like the Draft Articles on Responsibility of States for Internationally Wrongful Acts of 2001. This would be more conducive for States to adopt domestic legislation based on an international convention on crimes against humanity.