J. T. Murphy was one of the most important worker-intellectual figures of early twentieth-century British labour history. Using completely new and previously unpublished material (from the British Communist Party's archives and the Russian Centre for the Preservation and Study of Recent History in Moscow), this book not only tells the fascinating story of Murphy's political trajectory, but also provides a critical re-examination of the historical and social significance of the early British revolutionary movement in which he played such a prominent role.