While America grapples with its own dark past of slavery, a massive chapter of history gets buried by academics who fixate on Western guilt. Justin Marozzi’s eye-opening book, Captives and Companions, shines a light on the Islamic world’s slave trade, spanning over a millennium with unmatched scale and savagery. This isn’t ancient news, but it is a wake-up call for historians. Marozzi estimates that from the 7th century to the 20th, up to 17 million Africans and Europeans were enslaved in Muslim lands, dwarfing the transatlantic trade’s 11-15 million.