History is not only about the past.
It also shapes the way we see one another today.
A ship sets sail from the African coast.
Below deck, hundreds of men, women and children are chained together in darkness, pressed side by side on wooden planks.
They cannot stand. They cannot turn.
The air is thick and hard to breathe.
For the traders above, the people below deck are cargo.
Between the sixteenth and nineteenth centuries, scenes like this were repeated thousands of times across the Atlantic Ocean. By the time the trade ended, more than 12.5 million Africans had been forced onto slave ships. About 10.7 million survived the journey, only to be treated as property and forced to labour on plantations across the Americas.
Each year on 25 March, the world marks the International Day of Remembrance of the Victims of Slavery and the Transatlantic Slave Trade — a moment to pause and reflect.
Remembering slavery is not only about counting ships or naming ports. It is about understanding how such a system became possible.
Slavery did not begin with chains.
It began with ideas — ideas about who counts as fully human, whose life matters more, and whose suffering could be ignored.
Laws have changed, but some of the ideas that once justified slavery still echo in attitudes and perceptions today.
When we meet someone whose story we do not know — on a street, in a shop, on a bus — we make a quiet choice, often in a second.
Sometimes it happens in a glance, sometimes in a word, sometimes in silence.
The ships are gone. The chains are gone too.
But the way we see one another has not changed as much as we might like to think.
Our world changes the moment we recognise the full humanity of every person.