Wholly agree. A lot of work was done by Persians and North Africans. But the difference between the Abbasid and the Ottoman/Mughal/Safavids was that the Abbasid

Wholly agree. A lot of work was done by Persians and North Africans. But the difference between the Abbasid and the Ottoman/Mughal/Safavids was that the Abbasid Empire encouraged such studies, since they were a relatively liberal kind. Except in theological matters.