There is no way to determine the exact beginnings of slavery. Slavery pre-dates written records. One of the earliest known records of slavery is The Code of Hammurabi (ca. 1760 BC) which stated that anyone who helped a slave escape would be put to death.
Pertaining specifically to your question about Islamic societies, slavery was known in almost every ancient civilization including the Islamic Caliphate. We will never know who the FIRST society to use slavery was.
No.
They both had at least some slavery, and some of the settlements in each started for religioius freedom/refuge.
They didn't have slavery. Only the southern did.
Islam
Mostly in the early middle ages.
Slavery ended.
No they did not
The middle passage is how slaves got to America
Eugene Cotran has written: 'Yearbook of Islamic and Middle Eastern Law, 1998-1999 (Yearbook of Islamic and Middle Eastern Law, Vol 5)' 'Yearbook of Islamic and Middle Eastern Law' 'The law of marriage and divorce' -- subject(s): Divorce, Law and legislation, Marriage law 'Democracy:The Rule of Law and Islam (Cimel Book Series, 6.)' 'Yearbook of Islamic and Middle Eastern Law 1997/1998 (Yearbook of Islamic & Middle Eastern Law)' 'Casebook on Kenya customary law' -- subject(s): Cases, Customary law
Slavery was important in the middle colonies because they were used as farmers. The soil in the middle colonies was very fertile. Slaves were also used as nannies for children
Arabic was important to the Songhai Empire because it served as the language of trade, religion, and administration. It allowed for communication and interaction with other Islamic societies in North Africa and the Middle East. Additionally, it facilitated the spread of Islam within the empire.
"CSI is actively working to liberate Christians and others held in slavery in North Sudan. We have issued a Genocide Warning for religious minorities in the Islamic Middle East, and are working to send aid and raise political support for these threatened communities."