This moment is very significant for both Ralph and Jack. For Ralph this is the first major problem that they are going through as a civilization. He goes through somewhat of a trial that tests how he will respond when the fire goes out. He needed to assert his dominance and show that he is a strong chief. Until now he hasn't really been much of chief. He has just led discussions and organized things. For Jack this is representative of the change from being cooperative and thoughtful, to somewhat crazy and blood thirsty. His only caring about the pig shows how he has lost touch with what's really important on the island.