 In the 1970s and 1980s, you see this upsurge in enthusiasm for the supposed Celtic roots of Appalachian culture. To this end, the Celtic South paradigm, popularized by historians including Forrest MacDonald and Grady MacWinney, notice their surnames, in the 1970s emerged in tandem with an upsurge in public interest in the Scottish and Irish roots of Appalachian culture.