As far as we can understand, it is not essential to the islander's survival. Jack wants to hunt a pig partially because of the meat, but for the most part, he wishesn to have the satisfaction of pitting himself against another living animal, outsmarting it, and eventually killing it. Hunting was never something that the group needed to survive. Jack's reasons of hunting eventually become evn more and more selfish as the novel progresses.
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In the Lord of the Flies after they eat the boys reenact killing the pig.
He becomes more obsessed with killing a pig.
to prove his masculinity
Jack claims he only needed barbs on the spear head to kill the pig. Jack is consumed with killing a pig, but is unable to do so.
A Pig that he killed and that is when Ralph gets mad because Jack put out the fire to kill the pig and that is when the ship came but there were no saved because of Jack killing a pig. (Why is Jack SOOO Supid?)A slaughtered pig