What is the main conflict in The Orchard Keeper by Cormac McCarthy?

Marion Sylder, a whiskey bootlegger, is attacked by the lawless Kenneth Rattner but winds up killing him in self-defense. Years later, Sylder becomes friends with Kenneth Rattner's son, John Wesley, but neither knows their tragic connection. Elsewhere in Red Branch, an old orchard keeper named Arthur Ownby gets in trouble with the law for resisting the government's intrusion on his life, symbolized by a tank they keep on his property. When all is done, Ownby is in an asylum, Sylder is in jail, and John Wesley is the sole representative of the way Red Branch used to be.