No, that's not what they are saying. Slavery predates written records and was perpetrated by many cultures. It continues to exist in Africa (Mali, Niger, Sudan,

No, that's not what they are saying. Slavery predates written records and was perpetrated by many cultures. It continues to exist in Africa (Mali, Niger, Sudan, etc), in India (bonded labour), in the middle east (migrant workers) and other places. When one includes sexual slavery and trafficking, it's virtually everywhere.