It’s estimated that 17 million East Africans were sold into slavery: “Most people still have the so-called Transatlantic [slave] trade by Europeans into the New World in mind. But in reality the Arab-Muslim slavery was much greater,” N’diaye said.
This reminds me of how Thomas Sowell said that those who complain about Eurocentrism turn around and speak of slavery slavery with an exclusively Eurocentric perspective.