I think Chris was merely naïve and arrogant. This is one of the chief criticisms about Chris, especially with native Alaskans. I think Chris was an idealist and perhaps a naive idealist. His romantic notions of living a Thoreau-like life in the wilderness were at odds with the reality of the situation. Chris didn't realize what he was getting into and when he finally did, things had gotten out of hand. I think, however, that Krakauer was trying to say there was more to Chris McCandless than his ill-fated trip into the Alaskan wilderness.