In my book called Lord of the Flies, the cultural assumption of leadership is shown a lot during the whole story.
It starts in the first chapter where Ralph picks up the conch and calls all of the boys to a platform where they vote for Ralph to become leader of the group of boys. The cultural assumption of leadership shown in the book comes from WWII when the leader of a country going onto battle had to be strong and courageous.
An example from the book where leadership is shown is when Ralph calls for a meeting, and they need to sort out some important issues. A quote from the story where this is shown is “We need an assembly. Not for fun. Not for laughing and falling off the log”—the group of littluns on the twister giggled and looked at each other—“not for making jokes, or for”—he lifted the conch in an effort to ﬁnd the compelling word—“for cleverness. Not for these things. But to put things straight.”
Another example of leadership from the story would be Jack challenging Ralph for leadership by making his own "group" to survive on the island without Ralph. Jack started not to like Ralph because of the bad decisions he had made while Jack was still in Ralph's tribe. A quote for this is “I’m not going to be a part of Ralph’s lot—” He looked along the right-hand logs, numbering the hunters that had been a choir. “I’m going off by myself. He can catch his own pigs. Anyone who wants to hunt when I do can come too.”
I think what Jack did is selfish and self-centred and because of the way he treated the group, they would be better off without Jack anyway.
William Golding does not challenge the assumption of leadership because I think that it is the most common cultural assumption in the book. Jack represents the soldiers in war that were working for the other country. They never liked another country but they chose to fight for it to give their country a better advantage.