What is the theme in "To Build a Fire"?

There are several themes explored by Jack London in his
classic short story, "To Build a Fire," but they all seem to center around the theme of
Man Against Nature. The lone traveller--a "chechaquo," or
newcomer--is warned against making the mistakes that befall him during the severe
sub-freezing conditions. However, he neglects to heed them, only remembering the
warnings after the tragedies occur. He is warned about travelling alone in such
conditions and against treading on uncertain ice. He does so anyway, believing that his
own preparation and skills (and possibly luck) will protect him. When he builds the fire
under the snow-laden tree, however, his luck runs out. He finds out the hard way that
Mother Nature does not differentiate between good or bad, young or old, human or
animal.