Since the early days of Christianity, martyrdom has had a particularly honoured place, and 2020 will see the Catholic Church marking the fiftieth anniversary of the canonization of 40 martyrs killed during the Reformation in England and Wales. In this powerful exploration of the significance of martyrdom today, Catherine Pepinster looks at the lives of over a dozen martyrs, past and present, to consider how ideas about giving up your life for your faith have changed over the centuries, and especially the way martyrs often become caught up in the clash between religion and politics.