what is the authors purpose in the story

Jack London specialized in stories about the wilderness. His running theme involved the raw majesty and power of the elements. Naturalism was London's mantra and this story is a perfect example of this. In "To Build a Fire" the setting is in the Yukon. It is cold, merciless and wild. The man, who does not even have a name, is secondary to the setting. London wants to show the fragility of man in the natural world.