what is the significance of the conch. explain fully.

"Ralph and Piggy discover the conch shell on the beach at the start of the novel and use it to summon the boys together after the crash separates them. Used in this capacity, the conch shell becomes a powerful symbol of civilization and order in the novel. The shell effectively governs the boys’ meetings, for the boy who holds the shell holds the right to speak. In this regard, the shell is more than a symbol—it is an actual vessel of political legitimacy and democratic power. As the island civilization erodes and the boys descend into savagery, the conch shell loses its power and influence among them. Ralph clutches the shell desperately when he talks about his role in murdering Simon. Later, the other boys ignore Ralph and throw stones at him when he attempts to blow the conch in Jack’s camp. The boulder that Roger rolls onto Piggy also crushes the conch shell, signifying the demise of the civilized instinct among almost all the boys on the island."