From 1926 onward, Sinn Féin, which had been instrumental in the revolutionary period of 1919–23, faded into oblivion. This book unravels a chapter of history that has not been dealt with in detail until now, although the operation of the party raises fundamental questions on issues such as democracy and the role of history in the construction of a national narrative. Through a close analysis of newspaper reports, fortnightly Standing committee minutes, and interviews carried out by the author, it looks at the manner in which the party operated and put itself forward as the guardian of Republicanism in Ireland. The book offers a valuable insight into the meaning of Republicanism, and its narrative represents an integral part of the political and social fabric of contemporary Irish society, which will be of relevance to academics and to all readers with an interest in Irish republicanism.