What event signaled the end of rational rule on the island and indicated the beginnning of primitive life?????

Question

THIS IS IN THE BOOK LORD OF THE FLIES.

I COULDNT FIND THIS ANSWER IN THE BOOK I RE-READ THAT CHAPTER OVER AND OVER INTILL I FINALLY JUST GIVE UP...SO PLEASE HELP ME GUYS

Answer 1

2 choices, Piggy's death or Simon's. Can't remember which came first.