Social Change in Appalachia was interviewed extensively for the accompanying documentary to the mini-series.
In Feud, Waller tells the real story of the Hatfields and McCoys and the Tug Valley... placing the feud in the context of community and regional change in the era of industrialization.
Waller argues that the legendary feud was not an outgrowth of an inherently violent mountain culture but rather one manifestation of a contest for social and economic control between local people and outside industrial capitalists—the Hatfields were defending community autonomy while the McCoys were allied with the forces of industrial capitalism...
http://uncpressblog.com/
Did any of this make it into the miniseries? I'd be interested in watching it, if so.