In the lord of the flies, Golding wanted to show his readers that there is no such thing as innocence, even in the young. Clearly in the text, the first evidence of conflict between Ralph and Jack
manifested itself in the argument they had who was going to keep the fire burning. Respecting order and pursuing survival desires rather than pleasure was rejected by Jack. Humans follow their instincts when they have no technology or the pleasures of today to help them establish their survival pattern.
The lord of the flies (the pig's head on a stick) was the symbol of everyone's subconscious fear of the unknown.
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