"Into the Wild" by Jon Krakauer

Book which I choose to read on R/W class is "Into the Wild" by Jon Krakauer.In this book Krakower describe a true story a young man named Chris McCandles who decided to give $25,000 to charity,abandoned his car and most of his possessions, burned all the cash in his wallet, and invented a new life for himself. He went into the wild world of Alaska. He didn't have any preparation, equipment, even food and good boots. He didn't say good bye nobody. WHY?
Ok. This is enough for today because I have to read next pages of book . I'm just wondering what pushed him to do this, why he choose this hard way to live.