I already told you I cannot start a religious debate upon slavery on this forum.
As far as the abolition of slavery is concerned, then at no point in the 1400 years of history of Islam it came anywhere near to abolition. But the numbers of slaves only increased under the Islamic rule, right from the beginning.
Here is the complete TIMELINE of abolition of Slavery. There were almost 200 notable movements against slavery in human history, but NOT even a SINGLE of them came from Islam and its followers.
en.wikipedia.org