Discuss how Golding Uses Symbolism and Metaphor

Discuss how Golding uses symbolism and metaphor (piggys glasses, conch, Simon) to reveal this theme. Are these devices effective? What part does each play in revealing Goldings view of human nature? human kind is naturally evil
The central concern of Lord of the Flies is the conflict between two competing impulses that exist within all human beings: the instinct to live by rules, act peacefully, follow moral commands, and value the good of the group against the instinct to gratify one's immediate desires, act violently to obtain supremacy over others, and enforce one's will. …