At least Niger doesn’t recognize the Quran’s approval of slavery… I suppose that should count for something.
From BBC via Look Under the Burka Of Islam:
The pressure group Anti-Slavery International told the BBC the 63-year-old man was convicted of having what is known as a “fifth wife”.
Men in Niger are allowed to have four wives under a local interpretation of Islamic law.
With a “fifth wife”, no marriage takes place and the woman is treated solely as property. […]
Anti-Slavery International says “fifth wives” are often girls of slave descent sold to wealthy men who view the purchase of young women as a sign of prestige.
The women face a lifetime of physical and psychological abuse and forced labour, the group says.