as property,ted economically exploited, controlled through violence. >> top of the list, you produced this new index. a, whatyou -- mauritani is it about that country? >> you are talking about a country that has a long cultural tradition of hereditary forms of slavery. week it's been a long time talking about their history and participation -- we could spend a long time about the history of participation in the slave trade that existed in the times of the roman empire. fundamentally, you have ethnic groupings, three major ethnic groupings. the once you've run the country and a traditionally controlled have also traditionally owned other families as slaves and continue to do so. quickly, i need to find out, what is it that can be done about this -- we're talking about 20 million, 30 million people in slave. -- enslaved. >> one of the things we have done in the index is to break down the risk of enslavement and every one of those countries. we are able to point to the reasons that create slavery in each country, which then helps you to decide what is the appropriate intervention. >> all