Lord of the flies. In the role of nature how does living in a primitive setting drive the plot?

The plot of Lord of the Flies is very much about survival and how certain roles of groups will emerge any time you have a group of people, no matter where. A leader will always emerge and sometimes more than one which creates conflict. Also, a follower will emerge and they will side with the leader of their choice and follow their actions, even if it goes against what they might believe inside. They might follow out of fear and not just because they admire a leader. Being in a primitive setting shows that this idea of emerging roles will happen no matter what the setting and it has happened all the way back to cave people (similar to this primitive setting). Nobody has an advantage in this setting, being socially more refined, richer, etc. doesn't make one a better leader on an island.