DURHAM, North Carolina — Late one afternoon in March, officials unveiled a new monument at the University of the West Indies, in Cave Hill, Barbados. The ceremony featured African drumming, a historian’s lecture, a bishop’s prayer and a song performed by a school choir with the chorus, “We cry for the ancestors!”

Those ancestors, 295 of whom have their names on the monument, were slaves who once lived where the campus now stands. What today is a university was once a plantation. What is now a nation was once a colony. In Barbados and throughout the Caribbean, slavery remains a vivid and potent metaphor, and a cultivated memory.

Presiding over the event was Sir Hilary Beckles, the head of the university and a prolific historian. He and his Jamaican colleague Verene Shepherd have spurred on the recent call by the 15-member Caribbean Community for Britain, France and the Netherlands to pay an undefined amount of reparations for slavery and the slave trade. The group plans to file suit in national courts; if that fails, it will go to the International Court of Justice....