Though sometimes when he wakes in the night all he can think about is death. His own death, of course, but also the death of those around him,the fact that one day in the not-too-distant future every person he knows, every single one, will be dead and gone, along with all the people he doesn't know,to be replaced by a crop of strangers who will take over the structures left behind.
Basic personality traits develop early in life and over time become inviolable, hardwired. Most people learn little from experience, rarely thinking of adjusting their behavior, see problems as emanating from those around them, and keep on doing what they do in spite of everything, for better or worse.