When the boys first land, they are calm, collected, and try to have order reign. However, whenever they put the mask on, they turn into savages, ones with no conscience or moral compass. This whole book is about humanity, and the fragile balance between sanity and chaos. When people are desperate, they're mind chemistry changes. That is what this whole book is about, to remind people what is going on in the real world. That is why the mask is the most important symbol.
Symbolizes the entire book 's theme - change . The boys change when the put on the paint from British Boys to blood - thirsty savages. So yes , the most important symbol in William Golding 's Lord of the Flies is most definitely the face paint / mask .
The conch represents their system and how it falls apart as they slip deeper and deeper into savagery. Piggys glasses are much the same except that they represent intellectualism and reason.
By the way this is one if my favorite books of all time. I cried when they murdered Simon. And its difficult to pick from such an intricate web of symbolism. Im a actually doing an extended essay right now on lotf as it relates to the freudian division of the mind.