Haldun/Mukaddime

Savaşları tasnif ederken Kürtleri, Türkleri, Türkmenleri ve Arapları barbar olarak anlatmış:

The second (kind of war) - war caused by hostility - is usually found among savage nations living in the desert, such as the Arabs, the Turks, the Turkomans, the Kurds, and similar peoples. They earn their sustenance with their lances and their livelihood by depriving other people of their possessions. They declare war against those who defend their property against them. They have no further desire for rank and royal authority. Their minds and eyes are set only upon depriving other people of their possessions.

Siyahların da köleleştirilmeye uygun olduklarını, çünkü onların insani özelliklerinin daha az olduğunu ve daha çok hayvanlara benzediklerini iddia etmiş ayrıca:

Therefore, the Negro nations are, as a rule, submissive to slavery, because
(Negroes) have little (that is essentially) human and have attributes that are quite
similar to those of dumb animals, as we have stated.