Anton Chigurh is a Realistic Psychopath

Not realistic as in setting attainable carnage-causing goals, but realistic as in he resembles real-world psychopaths. (Of course this refers to the character in Cormac McCarthy and the Coen brothers' No Country For Old Men.) That is, per Leistedt and Linkowski in the Journal of Forensic Sciences; summarized at Mind Hacks. More here on Chigurh's use of language as a tool to move around people-shaped objects, and how he seems to be about the only person in the movie with functioning frontal lobes.