Why the UN declaration on the transatlantic slave trade matters

Ghana's President, John Dramani Mahama gesture to his supporters during a presidential election rally at Accra Sports Stadium in Accra, Ghana. [File, AFP] The resolution passed by United Nations General Assembly on 25 March 2026 seeking recognition of the transatlantic slave trade as the "gravest crime against humanity" potentially creates a broader definition of crimes against humanity in international law and allows for restitution claims against perpetrators. The resolution could elevate the legal and moral standard for what counts as the worst crimes against humanity, and compel more people to legally pursue reparations or compensation cases and thus deter such crimes. Proposed by Ghana, it was adopted with 123 votes. The United States, Israel and Argentina voted against it. Fifty-two countries abstained, among them the UK and European states. There has never been a single "gravest crime" designation applied to one human event or condition. Instead, international law defines categories of crimes considered the most serious. Examples are genocide, war crimes, crimes of aggression, and crimes against humanity. Being classified under these categories triggers severe legal consequences. These include global prosecution, lifelong accountability, international sanctions, and reparation claims. Ghana's declaration views transatlantic slavery and its system of forced African labour as the worst crime ever committed. It explains how millions of Africans were abducted, treated like property, and abused because of their race. The declaration points out that the effects of slavery still influence inequality and racism today. It calls on all nations to recognise what happened, teach its history honestly, and remember the victims. It also works towards fixing the lasting damage, including institutional and monetary reparations. Slavery shaped the modern world Transatlantic slaving was not an isolated historical episode but a foundational process that made the modern world. Between the 15th and 19th centuries, over 12 million Africans were forcibly removed from their homelands. It was a massive, organised system of theft that left African societies dealing with long-term demographic, political and economic disruptions. During the 1800s slavery changed form. It became tied to European imperialism. Powerful nations such as Britain and France took over land in Africa and other regions. The countries that had been major slave traders became the leading imperial powers in Africa. For example, French forces in the late 1800s still captured people and forced them into service. Laws in French west Africa didn't truly end slavery. They simply allowed colonial governments to take over land. The colonising countries often claimed they were bringing "civilisation". Similarly, European colonisers in central Africa - especially under Belgian rule in the Congo Free State (1885-1908) - caused massive suffering and death. Around 10 million people died over about 40 years. The creation of diaspora communities Over the course of transatlantic slaving, Africans participated, resisted, adapted, and preserved cultural and intellectual systems that would later shape diaspora communities and their bonds with Africa. Those bonds included shared historical experiences, cultural practices, religious systems, political ideas and intellectual traditions that travelled and transformed across the ocean. Recent calls for reparatory justice emerge from this long-standing network of connections. Ghana's resolution comes out of a convergence of continental and diaspora political efforts. African states and Caribbean nations have increasingly coordinated their positions on historical injustice and reparations. Ghana's resolution was built on earlier declarations: the Abuja Proclamation of 1993. It formally recognised that a moral debt is owed to the peoples of Africa for slavery and colonisation. the Durban Declaration and Programme of Action, tabled at the United Nations in 2001. In it transatlantic slaving was acknowledged as a crime against humanity. The Ghana declaration sets a precedent. It seeks to redefine the moral language of the international order. Elevating it as the gravest crime underscores slavery's scale and duration. Its systemic nature establishes it as the fundamental architect of global capitalism, racial hierarchies and modern state formation. Why it matters The Ghana declaration recognises the centrality of transatlantic slavery and compels a reassessment of how modern inequalities are explained and addressed. For contemporary Africa, this recognition carries material implications. The aftermath of transatlantic slaving are evident in patterns of underdevelopment, external dependency and unequal integration into global markets. A formal recognition at the highest level of international governance strengthens the basis for claims to reparatory justice. Such claims may take multiple forms. These may include investment in infrastructure, education and health systems. There could also be reforms to global financial institutions that boost mobilising resources within African borders. Equally significant is the resolution's role in consolidating pan-African and diasporic solidarity. By aligning African states with Caribbean nations and broader diaspora communities, it reactivates a political consciousness rooted in shared histories and strategic alignments. A unified transatlantic African bloc possesses greater leverage within - and outside - international institutions and can more effectively advocate for systemic transformation. The Ghana resolution also functions as a global educational intervention. Public understanding of transatlantic slaving often remains fragmented or minimised. This is true particularly in regions where some groups or historical individuals benefited from it. By placing this issue before the United Nations General Assembly, Ghana compels a broader confrontation with the scale and consequences of transatlantic slaving. This is essential for historical accuracy as well as for shaping near future policies and coordinated actions. Resistance lies ahead The resolution will face resistance. Some nations such as the United States and Great Britain remain wary of the legal and financial implications of a "gravest crime" recognition. The subject of reparations for them is contentious and untenable. These tensions reveal enduring asymmetries in global power and the difficulty of translating moral or historical claims into enforceable outcomes. Yet resistance itself underscores the resolution's significance. It exposes the extent to which historical injustices remain embedded in contemporary political and economic power arrangements.

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