This article examines the ways in which debates on ecclesiology in the Church of England served as a venue for the examination of political precept. It argues in particular that polemical sources – whether sermons, pamphlets, or longer works – reveal that discussion of conformity, the nature of the church, and its doctrine and discipline led to a broader examination of law, sovereignty, parliament, and the political costs of religious discord. Underlying the dispute was a fundamental tension over civil and sacred authority, and the relationship between politics – the realm of human custom and history – and doctrine – the realm of the divine and immemorial. The article offers a number of revisions to current discussions of the history of political thought, while pointing to the importance of religious discourse for our understanding of the political tensions that existed in the years prior to the English civil war.