Steve Martin, a writer and historian of black history, says our failure to do so is a sign that we still cannot agree on the very basics of what the slaver trade did to the world.

• 作家及黑人历史方面的历史学家史蒂夫·马丁说，我们没有做，就表明我们仍未就奴隶贸易对世界造成了什么样的危害这些最基本的问题，取得一致看法。