On April 15, some of the world's leading international lawyers and cross-party UK parliamentarians sent a public letter to British Prime Minister Rishi Sunak and Foreign Secretary David Cameron, urging them to support the Genocide Determination Bill that is currently under discussion in the House of Lords. This legislation, introduced by one of us (Alton) in late 2022, aims to establish an independent and impartial mechanism for preventing mass atrocities and ensuring that the United Kingdom adheres to its obligations under the 1948 Genocide Convention.

In December 2023, the international community marked the Convention's 75th anniversary. But mass atrocities, including crimes against humanity and genocide, remain a prominent and seemingly permanent feature of our world.

Between 2000 and 2020, at least 37 countries experienced or came perilously close to experiencing mass atrocities. The impact of such crimes extends beyond the immediate harm to their victims. They also lead to massive displacement, threaten international peace and security, and contribute to the rise of authoritarianism, which heightens the risk of future atrocities.

Despite these risks, the UK and other major countries have long adhered to a flawed policy of delegating responsibility for identifying crimes against humanity to international courts and tribunals rather than taking direct action. But international law, especially the obligation to prevent genocide, requires that governments - not courts - regularly assess the risk of genocide and use "all means reasonably available" to prevent or stop it.

While international courts can assess wrongful actions only after they have occurred, political, economic, and legal interventions by the global community are necessary well before any harm is inflicted. Consequently, governments must take the lead.

Regrettably, governments often attempt to shirk their international commitments by refusing to classify mass atrocities as "genocide." While they argue that such determinations should be left to international courts, they decline to engage with tribunals that could help prevent, stop, or punish such crimes. Worse, these governments frequently maintain full and normal relations with countries accused of committing these offenses.

The Genocide Determination Bill aims to remove this impasse. Under the proposed law, if a UK foreign secretary did not acknowledge an ongoing genocide or a significant risk of one, a designated parliamentary committee could conduct its own investigation. Should the foreign secretary agree with the committee's findings, they may take appropriate action.

Conversely, if the foreign secretary rejects the committee's conclusions, a UK court would have the authority to issue a preliminary ruling on the existence or potential risk of genocide. Should the court affirm the occurrence or risk of genocide, the secretary would be required to outline the reasonable steps that the government intends to take and specify the referral mechanisms, such as international courts, that it plans to use. Thus, the threat of parliamentary action would compel the government to act.

The bill also aims to establish a practical framework for the UK to meet its obligations under the Genocide Convention, facilitating the prevention and punishment of such crimes through concrete policy measures without constraining foreign policy.

It is important to note that this bill is not tied to any particular situation or conflict. Given that labeling a mass atrocity as genocide or a crime against humanity is often politically and legally contentious, the bill authorizes an impartial, independent, and apolitical determination by a UK court when all other options have been exhausted.

By making preliminary determinations, UK courts can act as safeguards against inaction, apathy, and impunity, thereby reaffirming the idea that core international crimes are prohibited regardless of who commits them. Rather than introduce new international laws, the bill aims to enforce existing ones by ensuring meaningful action even when governments fail to respond.

While much more can be done, acknowledging the existing legal and political realities is a crucial first step. Without this bill or a similar measure, political expediency will continue to prevail, and mass atrocities are likely to become even more widespread.

The liberal rules-based global order is arguably facing its most perilous moment since the end of World War II, as long-established international laws are increasingly challenged and frequently violated. Against this backdrop, the Genocide Determination Bill provides the UK government with a historic opportunity to align its policies with the UK's commitments and stated values, thereby setting an example for other governments to follow.

From Project Syndicate