why do ralph and piggy join the dance

Ralph and Piggy join the dance in "Lord of the Flies" because they are drawn in by the overwhelming influence of the savage impulses and chaotic environment on the island. The dance is a wild, frenzied ritual around Jack's bonfire, where the boys reenact the hunt and engage in tribal chanting and dancing, symbolizing their descent into savagery. Even though Ralph and Piggy have tried to uphold order and civility, they get swept up in the moment partly out of a need for belonging and to escape their isolation amid the group's breakdown of civilization. The dance represents a release from fear and tension, as well as a momentary immersion in collective primal emotion, which is difficult for them to resist in the charged atmosphere of the island's chaos. Their participation also shows how the veneer of civilization cracks under pressure, revealing the raw, savage impulses beneath.