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.
