Charles Stewart Parnell was James Joyce's most significant political influence to a degree that has yet to be fully acknowledged or explored. This thesis proposes a "theory of Parnell" in Joyce's works up to the end of Ulysses, arguing that close attention to Parnell's evolution points to a significant shift in the evolution of Joyce's literary forms. In Joyce's juvenilia, political writings, and early fiction, Parnell always appears with a heroic, even Messianic, cast, which the most significant moments in the fiction pair with a strict adherence to dramatic forms. However, significant moments in both "Ivy Day in the Committee Room" and A Portrait of the Artist as a Young Man lay the groundwork for stylistic and representative transformations in Ulysses. In that novel, the myth of Parnell is deflated, even as Joyce appropriates its most essential qualities in the development of his panoply of styles. Episodes from "Telemachus" to "Wandering Rocks" critically examine the myth of Parnell even as they link it with the constraints of dramatic forms. Later episodes, most notably "Cyclops," "Circe," and "Eumaeus" attempt to make use of elements of "Parnellite" style, training a community of readers in acts of collective imagination that keep the Parnellite spirit alive by moving away from a strict focus on his historical specificity.