And if you go back further still the Irish launched regular slave raids on Britain, with St. Patrick the most famous slave taken from Britain to Ireland. Doesn’t really matter who was first or who was last, all societies practiced slavery at some point and suffered slavery at some point. But it doesn’t matter how or when it happened to any society if the members of those societies aren’t around anymore - I never suffered as a result of Cromwell selling many Irish into slavery, people in Cardiff today never suffered from Irish slave raids on their country over a thousand years ago, and the only Africans suffering from slavery are those still owned by Arabs on the Berber coast.