Just read the book about 2 weeks ago. I am not a chemist or dietician, but from my understanding..the seeds McCandless ate ..at the time he ate them, had formed an alkaloid glaze. They didn't poison him directly, but made his system so he couldn't assimulate any food he ate..thereby starviing to death. Yes, there was something about his needing fat food, but didn't get any. The .22 he had was one he simply bought just before going in the "stampede trail" which led to the trail the bus was on that he lived in.
Instead of a geo map, he had only an old road map. Had he had an geo map, he would have known about a nearby & stocked ranger cabin. There were also a couple dog musher's stocked cabins, not too far away.
I got the impression that if he did not have a death wish, he was at the least..careless with his life.
Eskimo hunters..only what I read in "Gun Digest", a yearly gun book..One of them, many years ago sent his single shot .22 hornet in to big sporting store with gunsmith shop. He requested that the barrel be relined..He enclosed a list of game he had killed..some 600 odd of them, including seals & polar bears in quantity.
I saw a film on TV not long ago, concerning that young Canadian scientist killed by wolves. The local indians went out in search of the big north woods wolves...I noticed the main Indian hunter was carrying a .22 mag, just like the 882L I have. They must know what works.