What are some differences between Muslim and European slave trade?

Slaves were owned in all Islamic societies, both sedentary and nomadic, ranging from Arabia in the centre to North Africa in the west and to what is now Pakistan and Indonesia in the east. Some Islamic states, such as the Ottoman Empire, the Crimean Khanate, and the Sokoto caliphate [Nigeria], must be termed slave societies because slaves there were very important numerically as well as a focus of the polities' energies.

Explanation: Although Islam is much credited for moderating the age-old institution of slavery, which was also accepted and endorsed by the other monotheistic religions, Christianity and Judaism, and was a well-established custom of the pre-Islamic world, it has never preached the abolition of slavery as a doctrine.

Forough Jahanbaksh, Islam, Democracy and Religious Modernism in Iran, 1953-2000, 2001

The condition of slaves, like that of women, may well have improved with the coming of Islam, but the institution was not abolished, any more than it was under Christianity at this period.

Malise Ruthven, Islam in the World, 2000

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