http://atlantablackstar.com/2014/06...vement-of-black-people-not-taught-in-schools/
The Number of People Enslaved The number of people enslaved by Muslims has been a hotly debated topic, especially when the millions of Africans forced from their homelands are considered. Some historians estimate that between A.D. 650 and 1900, 10 to 20 million people were enslaved by Arab slave traders.
Others believe over 20 million enslaved Africans alone had been delivered through the trans-Sahara route alone to the Islamic world. Dr. John Alembellah Azumah in his 2001 book, The Legacy of Arab-Islam in Africa estimates that over 80 million Black people more died en route.