text: Rivalries traverse many different fields within society. A rivalry develops from the product of competition and ritualism between different parties. A rivalry is defined as "a perceptual categorizing process in which actors identify which states are sufficiently threatening competitors". Ritualism is "a series of ... iterated acts or performances that are ... famous in terms 'not entirely encoded by the performer'; that is, they are imbued by meanings external to the performer". Everyone that is part of the sports event in some capacity becomes a part of the ritualism. Teams get together before the game to warm up, coaches shake hands with each other, captains have a determinant of who gets the ball first, everyone stands during the national anthem, the fans sit in specific areas, they make certain gestures with their hands throughout the game, they wear specific gear that is associated with the team, and they have the same post-game practices every game of every season of every year. It is through this consistency of playing the same teams yearly that "these rivalries have shown remarkable staying power". Specifically, it is society's drive to disrupt these original rituals that start rivalries. Horst Helle says, "society needs a particular quantitative relationship of harmony and disharmony, association and competition, favour and disfavour, in order to take shape in a specific way". Society is drawn to this in sports because this is a principal characteristic in everyday life, which can be seen in historic religious rivalries, such as the contemporary example of sectarianism in Glasgow. Within an area, differences between two types of people can drive the start of a rivalry. Competition and support keep the rivalry going.