Ralph reminds Jack that he who holds the conch speaks, and should not speak without that symbol. Ralph tells Jack he must wait for the conch to speak. Throughout the story the conch operates a way to give order, yet at the same time it is always coveted by Jack because he who speaks has power. Eventually Jack refuses "to play" this game with the conch and other "games" reflective of civilization.
Ralph tells Jack that all he cares about is hunting. It is still improtant to maintain order, and keep the fire going, and focus on the efforts to be rescued.
This wins Ralph support from the others.