Politics in the Twentieth Century was dominated by a single question: how much of our collective life should be determined by the state, and what should be left to the market and civil society? Now the debate is different: to what extent should our lives be directed and controlled by powerful digital systems - and on what terms? Digital technologies - from artificial intelligence to blockchain, from robotics to virtual reality - are transforming the way we live together. Those who control the most powerful technologies are increasingly able to control the rest of us. As time goes on,...