For the Scottish Enlightenment thinker Adam Ferguson (1723Ferguson ( -1816 and many of his time, the history of the Roman Republic furnished the best case study for discussions of internal threats to a mixed system of government. These included factionalism, popular discontent, and the rise of demagogues seeking to concentrate power in their own hands. Ferguson has sometimes been interpreted as a 'Machiavellian' who celebrated the legacy of Rome and in particular the value of civic discord. By contrast, this article argues that he is better understood as a disciple of Montesquieu, who viewed Rome as an anachronistic and dangerous ideal in the eighteenth century, the era of the civilized and commercial monarchy.The greatest fear of Ferguson was military despotism, which was the likely outcome of democratic chaos produced by the levelling instincts of the 'common' people and demagogues prepared to harness their discontent. In such a scenario, a legitimate order in a mixed government would be turned into a faction putting the constitutional balance at risk, undermining intermediary powers, and ending liberty for all.Like many political thinkers in the eighteenth century, Adam Ferguson (1723Ferguson ( -1816 approached questions of empire, constitutionalism, and faction through the lens of the rise and fall of the Roman Republic. Ferguson's understudied History of the Progress and Termination of the Roman Republic (1783) has often been referred to as a straightforward narrative history, which is also how the author himself presented it. 1 Yet within the narrative, we will see that Ferguson evaluated events from the standpoint of a moralist and political thinker. The story was a familiar one, but eighteenth-century authors emphasized different elements and drew different conclusions depending on their political opinions and commitments. Ferguson often left lessons implicit in his rendition of events, but on several occasions he clearly stated his views. Although a strong believer in presenting historical facts