Llewelyn Moss, Anton Chigurh, and Bernie are all informed by their ‘personal codes.’ How do these codes change a person

Llewelyn Moss, Anton Chigurh, and Bernie are all informed by their "personal codes." How do these codes change a person? How does this code define who they are? Are such codes necessary? Develop an argument where you create criteria for a “moral person” and evaluate the three characters, showing how they do or do not match those criteria, and deciding which of the three is the most “moral person.”