There were so many reasons. One of them I would the Socio Economic Strategy.. slaves were jobless poor homeless and people with no money left.. and Islam supported them as a family member and given their rights..slaves got a shelter food & a real Kindness.
I remember the story of a Companion of Prophet (PBOH) that his slave accidentally put boiling water or a hot food on his kid and kid died on spot.
There were so many reasons. One of them I would the Socio Economic Strategy.. slaves were jobless poor homeless and people with no money left.. and Islam supported them as a family member and given their rights..slaves got a shelter food & a real Kindness.
I remember the story of a Companion of Prophet (PBOH) that his slave accidentally put boiling water or a hot food on his kid and kid died on spot.
Salve read this verse in front of Companion word by word http://corpus.quran.com/translation.jsp?chapter=3&verse=134
When he recite "who pardon the people" The companion said I forgave you. and wn he read "Allah loves the doers of good" he was released from slavery.