Really, it depends on the people.<p>I am reminded of the two miners who were trapped underground in China a few years ago.  Finally one gave in to his hunger pangs, killed and ate the other.  He was then rescued, less than 24 hours after they had become trapped.<p>Granted, the news reports I heard did not mention the ethnicity of either of the miners.  But I don't think many people would have predicted that outcome in a thought experiment.