All about Jack in "The Lord of the Flies"

The opening chapter begins with two boys, Piggy and Ralph, making their way through the jungle. We learn, through their dialogue, that they had been travelling in an airplane with a group of British school children. The plane had presumably been shot down and crashed on a an island in the Pacific. It is hinted that the rest of the world is at war, and that most of it has been destroyed by nuclear attacks--possibly explaining that the children were being evacuated.
A storm has come and gone, washing the wreckage away. Ralph and Piggy meet and revel at the prospect that they are alone on a tropical island with no adults. They make their way to the beach where they find a large conch shell. Using the shell as a horn, Ralph summons any other children that may be on the island.…