may contain some spoilers
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As many people seem to be mentioning girls in lord of the flies there is a book called "be nice" by Anabel donald which looks at what would happen if girls were shipwrecked on an island. There is also a very good television series called "uninhabited planet survive" or "mujiin wakusei survive" which also looks at human surval away from civilisation.
By the way does anyone else think it is strange that the boys are "saved" by the naval officer, but surely the society they are returning to is in ruins, possibly a worse state then the island due to the war? and the destruction of the atom bomb. I don't think they are really escaping human violence, but rather moving on to a more adult form of violence and destruction.
I definately agree that Simon is most likely a metaphor for Jesus as when he dies he is surrounded by glwing creatures that make a halo.
Is it symbollic that Piggy dies as the conch shatters, the conch was the first thing that brought the boys together and now lies in pieces parallel to their civilisation? Also surely the conch is a symboll of democracy and order, and Piggy seems to me to symbollise logic and intelligence, is it therefore a vital aspect of the plot that these things vanish together?