Since its emergence in Italy in 1968, one model of football fandom has become the most dominant in the world: the ultras. Producing complex choreography, chants, banners and pyrotechnics, ultras represent a highly organised style of fandom that has an increasing global reach and visibility. Over the last fifty years, ultras fandom has spread from Southern Europe across North Africa to Northern and Eastern Europe, South East Asia and North America. Their collective performance, unity and harmonisation not only distinguish ultras from other football fans, but from many other forms of group...