This captivating book delves into the secretive world of the Irish Republican Brotherhood (IRB) and its profound impact on Ireland's political landscape between 1914 and 1924. With the aid of new documentation, Ranelagh unravels the true influence of the oath-bound society without which the 1916 Rising might never have taken shape. For Michael Collins, the IRB was the true custodian of the Irish Republic, and the only body he pledged his loyalty to, but its legacy remains obscured by its intense secrecy. This book re-introduces the IRB as the organisation that created and furnished the IRA, influenced the result of the critical 1918 election, and changed the face of Irish history. From É amon de Valera's recollections of how he first learned of the Treaty to narratives from Nora Connolly O' Brien, Emmett Dalton, and others, testimonies from key figures paint a vivid picture of the IRB's inner workings and external influence. A fascinating exploration of secret societies, political manoeuvres, and personal sacrifices, The Organisation casts new light on a pivotal chapter in Ireland's quest for independence.