Ralph decides that he must build shelters for all the littluns to make them feel safe from the “beastie”, as the boys call it, while Jack is out hunting with the choir, but when none of the boys agree to help neither Ralph or Jack, it soon turns into a tremendous backfire. The boys are all on the beach running around putting no attention to the help the older boys are in great need of. This is representing evil, although it doesn't seem as harmful as it should. But things get much worse once Jack becomes more and more obsessed with hunting-- no longer doing it for the good of the island, but for the enjoyment of killing.
Once Jack finally kills a pig, he feels a humongous rush of achievement, celebrating by doing a war dance with the other boys. Ralph, Simon, and Piggy spot a ship, but when they go up on the top of the mountain, it's too late. While Simon and his hunters were out hunting, they let the signal fire burn out causing the ship to pass by with no site of the boys. They were too obsessed with hunting to pay any attention to their job that could have saved their lives.
Jack and his tribe assemble a feast and invite the rest of the boys. They do their war dance and in the middle of this, Simon appears to tell them that there is no beast, but all the boys kill him-- finding joy in the brutal murder of his death. It's entirely out of control and evil has gotten so severe, it has destroyed any order left on the island and discipline is ripped to pieces.
Discipline can make an entire difference on a community no matter how serious it is. Although rules are made by others in order for you to follow them, your acts are depended on yourself and how you process them to impact the world around you.