The theme of "Lord of the Flies"

Throughout the book, multiple things pop out as possible themes, but there are only a few mani themes. One of those main themes  in "Lord of the Flies" is the Loss of innocence.

In the beginning of the book, everyone was very friendly towards each other and worked together to get stuff done. By the time the book starts picking up, everyone has gotten much more hostile towards each other and have one thing on their mind a lot. And that thing was to kill. And finally, by the end of the book, multiple pigs and 2 kids were killed, and many others were tortured.

That showed that everyone let their hostile side show throughout the book. All of those kid's innocence was lost the second they crash landed on that island.