From raucous football matches and raves to rubber-bullet-riddled riots, Hancox takes us into the crowd's pulsating heart to pose the questions that will define our age. Multitudes argues it is time to rethink long-held assumptions about crowd behaviour and psychology. The story of the modern world is the story of multitudes in action. Crowds are the ultimate force for change: the bringer of conviviality, euphoria, mass culture and democracy.