“…As one of Buchanan's co-authors, Roger Congleton (2014: 54), wrote, ‘If even slavery is conceptually compatible with [Buchanan's] contractarianism’, then it would seem within his theory no social state can ‘be considered illegitimate’. Slavery might also be considered a salient example given Nancy MacLean's (2017) claims that Buchanan advanced a covert racist agenda, although the credibility of MacLean's work has been significantly diminished by subsequent scholarship (Farrant, 2019; Farrant and Tarko, 2019; Magness, 2020; Magness et al ., 2019; Marciano, 2020; Munger, 2018a).…”