Re: Figures.
Too many.
It's why I have no truck with the people constantly going on about slavery from over a century ago. If you're going back beyond living memory everybody's race and culture has perpetuated and been a victim of slavery.
Put that energy and effort into tackling the human trafficking, sex slavery, abuse, indentured servitude, de facto and actual slavery that are happening in the world today. There are actual slave auctions still, some countries support slavery and I'd guess every single country has it happening to at least a small degree - indeed, several recent cases have occurred in the UK.
Let's address that, and no, I don't think Facebook is material here.