The main idea of Into the Wild is Chris McCandless tries to find happiness outside of society and materials and with solitude, minimalism, and nature
Chris McCandless liked to go one solo road trips. "He'd been in the habit of taking extended solo road trips". (Krakauser 16) He liked to be out in the wilderness alone, it made him happy.
After graduating, McCandless burned all his material bridges "He would shortly donate all the money in his college fund to OXFAM". "It [his apartment] was empty and a FOR RENT sign was taped to the window" (Krakauser 16).
McCandless told his parents that he was going to "disappear for a while"(Krakauser 16). He did this all the time, so his parents weren't that surprised. But they wanted to see him before he left.
McCandless takes his yellow Datsun, some cash and embarks on his odyssey. "Five weeks earlier he'd loaded all his belongings into his little car an headed west without an itinerary" (Krakuaser 17). Chris uproots hi whole life to go on a life fulfilling trip.
McCandless' car stops working after the rain. Instead of looking at this as a burden, he decides that this is the perfect way for him to shed unnecessary materials. "He saw the flash flood as an opportunity to shed unnecessary baggage. He concealed the car as best he could...buried his Winchester hunting rifle....he arranged all his paper currency in a pile on the sand....and put a match to it"(Krakuaser 19) Now he can find happiness.