According to douglass, how must human nature adapt to permit and even promote slavery?

 Douglass drew on the idea of natural rights and the natural law tradition in his argument against slavery.He had a firm faith in the progress of man, civilization, and Western Christendom; hence, he saw American slavery as a brutal backwardness that ran counter to the progress of history. Take care i hope that helps :p

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the arab empire adopted the muslim religion as their main belief. arabs would influence the people from the territories they invaded towards islam (the muslim belief).

nevertheless, throughout the history of the arab empire, rulers brought intellectual individuals from other religions to their centers of learning. these other foreigners included jews, christians, greeks, persians, and indians.   these resulted in the adoption of important knowledge developed by these cultures by the arabic empire. for example, the works of aristotle were translated from greek to arab and indian scientists brought the numerical concept of "zero" to the arabs.

nowadays, 93% of the arab population is muslim, which at the same time is subdivided in sects including the sunni, zaini, alawi, shia. the remaining 7% is composed mainly of christians.