Jack is immediately presented as the antagonist of the novel. Unlike Ralph's good looks, he is described as ugly and arrogant. His red hair may symbolise danger and evil whereas Ralph's blonde hair appears to symbolise goodness

Jack leads the choir that is described as a 'dark creature' which foreshadows his progression towards savagery and evil later in the novel

The adjectives Golding uses to describe Jack become more primal and animalistic

Jack creates a mask for himself. This is a significant turning point as it seems to liberate him from his conscience, encouraging him to become more savage

Jack eventually breaks away from Ralph's group. He turns his back on civilisation and the democracy of the conch

Jack uses the boys' fear of the beast to maintain control

Jack and Roger's murder of Piggy marks their complete transition form humans to savages.
Jack is now murdering with intent.
He is a cold-blooded killer by the end of the novel