Steinbeck's East of Eden
was clearly an Cain and Able theme. I never checked Cliff's Notes, but if it differs, it is wrong.
Lets see, a father (godlike figure), two sons. One doing everything possible to please father, and the other found and gave a stray puppy, which god loved. Son number one damn near killed him.
Son number two becomes the god like father of another generation, and remarkable coincidence, there were two sons. The one most pleasing was driven off to war and killed.
This could be developed over pages, but that's the idea. Hey, here's a thought. Run down to a bookstore and browse through Cliff's Notes.