An American film, No Country for Old Men, is very profound after watching it, but I don't know what it is about. Please explain to the experts.

"Even in the struggle between humans and animals, the result is uncertain." This is what Cohen told us through Simple Blood, Blizzard and The Absent Man, and "the uncertainty of events" has also become the theme of No Country for Old Men. The older a person is, the more he feels that his control over the world is so weak and the world is so absurd. No society, no country is suitable for the elderly, because the elderly have a more thorough understanding of the world but are also more powerless. So Tom's uncle told him, "You can't control the incident, it's no use." . Then, it is the funeral of mother-in-law Moss, suggesting that death is the ultimate destination of their old people.