A world that is fully known, in which everything has been planned and mastered, would be a dead world. And precisely because of this, ‘life,’ the experience of feeling alive and truly encountering the world, always seems to elude us. This in turn leads to frustration, anger and even despair, which then manifest themselves in, among other things, acts of impotent political aggression. For Rosa, to encounter the world and achieve resonance with it requires us to be open to that which extends beyond our control. The outcome of this process cannot be predicted, and this is why moments of resonance are always concomitant with moments of uncontrollability. This short book – the sequel to Rosa’s path-breaking work on social acceleration and resonance – will be of great interest students and scholars in sociology and the social sciences and to anyone concerned with the nature of modern social life.