The UN Treaty on Crimes Against Humanity: A Guide to the First Multilateral Convention and the Codification of Gender Apartheid

For nearly 80 years, the architecture of international law has contained a glaring structural omission. While genocide and war crimes are governed by dedicated, comprehensive global treaties that obligate nations to actively prevent and punish them, crimes against humanity—defined as widespread or systematic attacks directed against any civilian population—have never had their own standalone convention. Instead, international prosecutors and domestic courts have had to rely on a complex patchwork of customary international law and the specific statutes of ad hoc tribunals, such as the International Criminal Court. This lack of a dedicated treaty has left a critical gap in the global justice system, making it harder to hold perpetrators accountable for state-sponsored atrocities that occur outside the context of an active armed conflict.

That historical gap is finally closing. Following a landmark December 2024 United Nations General Assembly resolution, the international community has officially entered the drafting phase for the first multilateral Convention on the Prevention and Punishment of Crimes Against Humanity. The process represents a generational opportunity to consolidate global commitments, harmonize domestic laws, and establish clear mechanisms for mutual legal assistance and extradition. By creating a binding legal framework, the treaty aims to elevate crimes against humanity to the same undeniable legal status as genocide, ensuring that state-sponsored atrocities are universally recognized and prosecuted across all jurisdictions.

In January 2026, the UN Preparatory Committee (PrepCom) convened in New York to negotiate the procedural and substantive groundwork for the treaty. Over two weeks of intensive diplomatic sessions, member states debated the scope of the convention and the specific language of the draft articles originally authored by the International Law Commission. This session culminated in a critical April 30, 2026 deadline for member states to submit formal proposals for amendments to the draft text. These submissions will form the compiled text that will serve as the foundation for the final treaty negotiations.[1]

As diplomats prepare the compiled text for the final plenipotentiary conferences scheduled for 2028 and 2029, the treaty has become the focal point for a profound modernization of human rights law. At the center of the debate is a massive, coordinated global campaign by civil society organizations, Nobel laureates, and legal scholars to formally codify 'gender apartheid' as a crime against humanity. This push represents a fundamental shift in how the international community views and prosecutes the systematic, state-sponsored subjugation of women and girls.

The urgency to recognize gender apartheid is driven by the lived realities of women and girls in Afghanistan and Iran. Since returning to power in 2021, the Taliban has systematically erased Afghan women from public life, banning them from secondary education, universities, and most workplaces, while enforcing draconian restrictions on their movement, dress, and autonomy. Human rights defenders argue that these policies are not merely discriminatory, but represent a coordinated, state-level campaign to restructure society entirely around male supremacy, utilizing the full apparatus of the state to enforce total subjugation.

Legal experts and frontline human rights defenders argue that these actions go far beyond localized discrimination and cross the threshold into international atrocity crimes. They constitute an institutionalized regime of systematic oppression and domination designed explicitly to maintain male supremacy. Yet, under current international law, the crime of apartheid is strictly defined by racial domination. This historical definition leaves victims of systematic gender-based subjugation without a precise legal remedy that captures the full severity and structural nature of their oppression, forcing prosecutors to rely on lesser charges like 'persecution' that fail to convey the institutionalized nature of the crime.[1][2]

The existing definition of apartheid, rooted in the mid-20th-century response to South Africa's racist regime, fails to capture the patriarchal subjugation endured by women under regimes like the Taliban. Advocates argue that failing to update this definition in the new treaty would perpetuate a dangerous impunity gap. It would effectively signal to oppressive governments that the total, state-sponsored erasure of women does not cross the threshold of an international atrocity crime, thereby emboldening authoritarian regimes to further restrict the fundamental rights of women and girls without fear of international legal consequences.[2]

To close this gap, international legal scholars have proposed three distinct pathways for the new treaty. The first approach suggests creating a standalone crime of 'gender apartheid,' mirroring the existing racial apartheid provision but replacing 'racial groups' with 'gender groups.' This would create a parallel but distinct legal category, ensuring that gender-based oppression is recognized with the exact same gravity as racial oppression. Proponents of this approach argue it provides clarity for prosecutors and honors the specific, unique mechanisms of patriarchal subjugation without altering the historical definition of racial apartheid that many states wish to preserve.

A second, more integrated proposal would retain apartheid as a single, unified crime but expand its definition to include inhumane acts committed to maintain domination 'by one racial group over any other racial group or groups, or by one gender group over another gender group or groups.' This formulation acknowledges that the mechanics of institutionalized domination are fundamentally similar, whether based on race or gender, and seeks to modernize the core concept of apartheid for the 21st century. Supporters argue this prevents the fragmentation of international criminal law and ensures that all forms of systemic, state-sponsored domination are treated under a single, powerful legal framework.

A third formulation, favored by several UN working groups, advocates for a broader definition based on 'systematic discrimination, oppression and domination by one group over another group or groups, based on race or gender.' Proponents argue this version best captures how patriarchal and racist oppression often intersect, ensuring that victims of overlapping discrimination—such as minority women who face compounded subjugation—are not excluded by rigid legal categories. This inclusive approach is designed to future-proof the treaty against evolving forms of state-sponsored oppression, moving away from biological or hereditary assumptions and focusing entirely on the systemic nature of the discrimination itself.

However, the campaign to codify gender apartheid has encountered significant resistance from a coalition of traditionalist states and the Holy See. During the January 2026 PrepCom sessions, these delegations pushed back fiercely against leaving the term 'gender' undefined or treating it as a social construct. They argued that the treaty must adhere strictly to the biological definition of male and female, expressing deep skepticism about the introduction of new sociological concepts into binding international criminal law. This bloc of nations insists that legal precision is paramount, and that expanding definitions beyond biological sex could lead to unintended jurisdictional overreach.

Conservative nations argue that without anchoring 'gender' to the strict biological definition found in the Rome Statute of the International Criminal Court, the new treaty could be weaponized. They express concern that an open-ended definition could criminalize domestic political opposition to LGBTQ+ rights, abortion access, or traditional family policies. From their perspective, the push to codify gender apartheid is a Trojan horse designed to impose progressive Western social policies on the rest of the world under the guise of preventing atrocity crimes. They warn that such ambiguity could deter widespread ratification, ultimately weakening the treaty's global legitimacy and effectiveness.

Conversely, progressive legal scholars and civil society groups warn against reverting to the Rome Statute's restrictive language. They argue that defining gender strictly as a biological binary would actively exclude LGBTQ+ individuals, who are frequently targeted for severe persecution by the exact same regimes enforcing gender apartheid. By insisting on an inclusive definition, advocates hope to ensure that the treaty protects all individuals who are systematically oppressed based on their gender identity or expression, reflecting decades of advancement in international human rights law. They contend that a modern treaty must address the realities of contemporary oppression, rather than clinging to outdated frameworks that leave vulnerable populations unprotected.

The stakes of these negotiations extend far beyond legal semantics. A dedicated Crimes Against Humanity treaty would obligate signatory states not only to refrain from committing these acts but to actively prevent and punish them within their own borders, regardless of whether they occur during an armed conflict. This represents a massive leap forward in global accountability, shifting the burden of justice from international tribunals to domestic legal systems, and requiring nations to implement robust anti-atrocity legislation at the national level. It would transform the prevention of crimes against humanity from a moral aspiration into a binding, enforceable domestic legal duty.

Crucially, the treaty would establish a robust framework for mutual legal assistance, enabling domestic courts around the world to prosecute perpetrators under the principle of universal jurisdiction. By requiring states to either extradite or prosecute individuals accused of these crimes, the convention aims to permanently shrink the safe havens available to the architects of systematic oppression. If gender apartheid is included in this framework, officials responsible for the systemic subjugation of women could face arrest and prosecution the moment they step foot in any signatory country. This creates a powerful deterrent effect, isolating oppressive regimes both legally and diplomatically.

As the United Nations compiles the state amendments for the next phase of negotiations, the international community faces a defining test. The resulting treaty will either cement a mid-20th-century understanding of human rights or evolve to protect the most vulnerable populations of the 21st century. For the women and girls living under regimes of absolute subjugation, the codification of gender apartheid represents more than just a legal victory; it is a declaration that the world recognizes their systemic erasure as one of the gravest crimes known to humanity. The decisions made between now and the 2029 plenipotentiary conference will shape the architecture of international justice for generations to come.[3]