The UN General Assembly has passed a resolution declaring the transatlantic slave trade the gravest crime against humanity, with Brazil being the last nation to abolish slavery, having received nearly half of enslaved Africans.

Carys Garland is joined by Jan Onoszko, our correspondent from Rio, standing at a site where history is embedded in stone, a physical threshold through which nearly a million enslaved Africans were forced into Brazil over four decades. The UN General Assembly just passed a resolution declaring the transatlantic slave trade the gravest crime against humanity. While the resolution is not legally binding, its symbolic force reverberates deeply, especially in a country like Brazil, which received ne...