The Anarchy was the first civil war in post-Conquest England, enduring throughout the reign of King Stephen between 1135 and 1154. It ultimately brought about the end of the Norman dynasty and the birth of the mighty Plantagenet kings. When Henry I died having lost his only legitimate son in a shipwreck, he had caused all of his barons to swear to recognize his daughter Matilda, widow of the Holy Roman Emperor, as his heir and remarried her to Geoffrey,...