In my opinion the biggest symbol in the book "lord of the flies" is the signal fire when the fire is burning bright and going good so are all of the boys on the island but when the fire burns out the boys are going through a lot of complications in the beginning the boys obeyed the rules and orders and everything was fine along with the fire but when jack became insane with catching the pig the fire went out pretty much the it showed the highs and lows of them
the conch is another symbol in the book "lord of the flies" in my opinion the conch symbolizes power who ever is holding the conch has the power in the group discussions but people get power hungry and delirious like jack and form there own groups just because they want to be in control
piggy's glasses is another symbol in the book "lord of the flies" because it made me think of intelligence and it they were used to create the signal fire