In this article, I propose that the key to the underlying dissidence of M. G. Lewis's The Monk lies in the novel's depiction of consent, a fundamental principle in late eighteenth-century British discourse. For British thinkers of all stripes, a government and populace that valued consent made Britain the greatest nation in the world; The Monk disrupts this worldview by portraying consent, whether express or tacit, political or sexual, as incoherent. By depicting consent as illegible and pervasively undermining the distinction between consent and coercion, The Monk effectually threatens a value that rested at the core of late eighteenth-century British identity.