The boys elected Ralph for their chief.  This decision is noteworthy for two reasons.  First, the boys' decision to have a vote reinforces their ties to civilization and order; moreover, it is interesting to note that Roger, who becomes one of the most savage boys on the island, is the first one to suggest the idea of voting.  Second, the boys elect Ralph for their chief, largely influenced by the presence of the conch, which the narrator points out had reminded the boys of the authority figure at the airport who had a megaphone.  Ralph's age and linked authority to the conch elicits respect and acknowledgment from the other boys.  The early election on the island is a noteworthy event because it reveals that the boys are still very much tied to their old lives and civilization.