To build a fire
I think the most important lesson to be learned from the story "to build a fire" would be that you should always travel with a group. This is the most important lesson to be learned from this story because if he would've survived. The reason that he would've survived if he had a group was the fact that when he needed to build a fire to thaw out his hands and feet. But because his hands and feet were frozen he couldn't. Although if he had a partner his partner could have built the fire and he would have been fine. Another reason that a partner would've helped him survive was that when he fell in the snow and couldn't get up his partner could have helped him up.