The main idea is about freedom or being independent.
Explanation:
This is an excerpt from Into the Wild by Jon Krakauer
This is about a man who went into the wild on adventure. he met many people who were willing to help him. The main idea was McCandless wanted to be free from people who show their authority.
The level of freedom he requires is complete isolation. He says he wanted to wear shoes without socks but the rule is that the employees had to wear proper footwear.
