The name Sinn Fein is commonly associated with the Northern Ireland conflict and the IRA. What often escapes the observer's focus is that the party Sinn Fein has a long history of development. The label "political arm of the IRA" only vaguely describes the many facets of its history. This book paints a contrasting picture of Sinn Fein and the evolution of its self-image, from its founding to the present day. It illustrates how a small protest party transformed into a terrorist organization and ultimately became a political force in government. The architecture of the Northern Ireland conflict plays a role here, as do the developments in the perception of its own tradition. Therefore, this book contributes to a comprehensive understanding of Sinn Fein.