jacqui - you can read the reports about human trafficking, forced labour, domestic 'servants' etc prepared for Anti-Slavery International here

This is the best resource I know for such information. If you look through the website there are campaigns to support if you feel so inclined. In my opinion this would be a much better way of using one's time than carping on about who were the worst slavers in history and whether we should be apologising for them now.