This chapter examines the politics of Scottish Presbyterianism in the years surrounding George I’s accession. After assessing the fortunes of the Scottish Episcopalians, the chapter analyses the tensions among Presbyterians within, and on the fringes of, the established Church of Scotland. It first reconstructs the critique of the establishment articulated by the Hebronites and United Societies, Presbyterian groups that advocated partial or complete withdrawal from the Church. The chapter then shows how the controversy over the oath of abjuration, imposed on clergy in 1712, prompted the separation from the Church of two ministers in the Dumfries area. The ministers made a coherent case for separation and propagated a Presbyterian critique of the Hanoverian succession. Moreover, they set a precedent for future secessions from the Church of Scotland. The catastrophe of the Jacobite rising in 1715 weakened the Episcopalian cause, and thereafter Presbyterian Dissent became the main motor driving the further fragmentation of Scottish Protestantism.