2018 Reith Lectures - Professor Margaret Macmillan - The Mark of Cain BBC World Service - The Reith Lectures, War and Humanity War and Humanity The Reith Lectures Is war an essential part of being human? Are we destined to fight? That is the central question that this year’s BBC Reith Lecturer, Professor Margaret Macmillan, addresses in five lectures, recorded in the UK, Lebanon and Canada. In her series, called The Mark of Cain, she will explore the tangled history of war and society and our complicated feelings towards it and towards those who fight, as well as answering questions from the audience.