How did the boys attitude changed towards killing?

Answer 1

At the end of chapter 1: The Sound of the Shell Jack understandably hesitated at the prospect of plunging his sheath knife into the flesh of a terrified, squealing piglet. The piglet escaped. Jack was embarrassed by his failure to kill the piglet and vowed that next time he would do it. The first presumed death was of the littlun with the mulberry coloured birth mark on his face, his death was entirely due to negligence and seemed to cause some shame and guilt on the part of the boys. Eventually Jack and his hunters hunted and killed a pig. Later still, when Jack and his hunters killed a sow, Jack 'flinked' his hunters with the sow's blood and rubbed his blood covered hands on Maurice's cheeks. All the boys simply found it amusing and exciting to kill a pig. After the death of Simon Ralph was filled with remorse. Piggy tried to lay part of the blame on Simon himself and the twins tried to pretend it had never happened. Jack however simply shrugged the episode off as something of little or no importance. Similarly, although Jack hadn't authorised the killing of Piggy, he claimed responsibility and then deliberately tried to kill Ralph. At the end of the book killing by negligence and then killing for food had evolved, via killing for excitement, through killing by mistake and killing almost casually, to deliberate premeditated hunting of Ralph with the full intention of killing him and mounting his head on a stake.