The relationships among the characters are also important. In the 'society of the snow original story', they might need to cooperate or compete with each other. For example, some may have different skills and they need to work together to make use of those skills for the group's survival. At the same time, there could be conflicts over limited resources.
It shows the selfish side of human nature. When resources are scarce in the snow - covered world, some characters might be tempted to hoard things for themselves rather than share with others.
No, it's not. 'Society on the Snow' is a fictional creation. The author likely drew inspiration from various sources but didn't base it on actual events.