4 ideas
In 1980 West Texas, Vietnam veteran and welder Llewelyn Moss finds dead men, a truck of heroin and a satchel holding about $2.4 million after a cartel deal goes wrong, and he takes the cash. A single decision, his return that night to bring water to a dying man, gives him away to his pursuers, and hitman Anton Chigurh tracks him with a transponder hidden in the money.
Chigurh makes some victims call a coin flip for their lives, and he presents the outcome as fixed by every choice that led them to that moment, not by him. The mechanism is moral laundering: turning a killing into a chance event lets the killer claim he is only the instrument of fate, while the victim is made complicit by being forced to call.
Sheriff Ed Tom Bell argues that social collapse does not start with massacres but with the loss of small manners, such as people no longer saying 'sir' and 'ma'am', which leads by degrees to indifference and then to atrocity. In this account, violence is the late symptom of a long erosion of shared standards. The novel also undercuts the claim through Bell's uncle Ellis, who reminds him that the country was always violent, so the nostalgia may reflect Bell's age more than any real change.
The book judges its characters by whether they keep faith with their obligations when they cannot win, not by whether they defeat evil. Bell retires in defeat, but his closing dream of his father riding ahead to make a fire in the dark and waiting for him frames decency as carrying a light forward for those who come after. Seen this way, a failed lawman's ethics are measured by persistence and witness, not by outcomes.