Plots, Designs, and Schemes is the first study that investigates the long history of American conspiracy theories from the perspective of literary and cultural studies. Since research in these fields has so far almost exclusively focused on the contemporary period, the book concentrates on the time before 1960. Four detailed case studies offer close readings of the Salem witchcraft crisis of 1692, fears of Catholic invasion during the 1830s to 1850s, antebellum conspiracy theories about slavery, and anxieties about Communist subversion during the 1950s. The study primarily engages with factual texts, such as sermons, pamphlets, political speeches, and confessional narratives, but it also analyzes how fears of conspiracy were dramatized and negotiated in fictional texts, such as Nathaniel Hawthorne's Young Goodman Brown (1835) or Hermann Melville's Benito Cereno (1855).