A very interesting article, especially in that historians still aren't sure why war-based slavery died out completely in Britain in only 60 years -- between 1066 and 1120. You have to wonder if there was mostly an economic reason for it, like making more money from renting to serfs than owning them and having to house and upkeep them (as the article suggests). I can't believe the angels of lords' better natures was the catalyst. The uptake of Christianity thereabouts begat 800 years earlier with Charlemagne; that's a heck of a long gestation to develop a moral conscience.