This thesis will undertake a critical examination of Dublin literary culture during the middle decades of the twentieth-century with a view to the identification and definition of a distinct movement of writers and artists whose commonality of output and shared vision has yet to be academically recognised. In doing so it will highlight the development of a coherent, sustained approach to the production of literature and art that was espoused by the group throughout the 1950s and beyond, and enjoyed subsequent manifestations within wider literary and artistic circles of Northern Ireland and England. Drawing on both an extensive reinterpretation of existing sources, and a significant cache of newly discovered manuscripts, it will come to show how the oftderided period of the post-War decade in Ireland actually represented the embryonic form of a subsequently robust and markedly distinctive literary and artistic philosophy that transcended its contextual origins and came to influence cultural affairs on the island of Ireland for much of the late twentieth century.