Ghana hosted a landmark global conference on Thursday seeking to translate growing political support for slavery reparations into practical commitments towards justice.

The conference, which brought together leaders from around Africa and the Caribbean, comes after the United Nations adopted a historic resolution that declared the transatlantic slave trade "the gravest crime against humanity".

Since the resolution's adoption in March, the campaign for reparations has gathered "unprecedented momentum", said Ghana's Foreign Minister Samuel Ablakwa.

While non-binding, the resolution -- pushed for by Ghanaian President John Mahama -- goes beyond simple acknowledgement and asks nations involved in the slave trade to engage in "restitution" and "compensation".

"We won the battle against slavery, we won the battle against colonialism, we won the battle against apartheid, and we are confident that we shall win the battle against reparatory injustice," Ablakwa told the conference.