What is the theme in Barn Burning by William Faulkner?

One major theme in the text is that of anger, an all encompassing anger that drives Abner Snopes to retaliate and revenge any perceived slight or wrong against him. Although other characters experience anger in the story, we can understand their reactions. Examples of this can be found in the anger of Mr. Harris and Major de Spain. Then there's Salty's anger, which is a direct result and reaction to his father's anger and actions.... a vicious circle.