Let’s talk believable antagonists and realistic sources of conflict.
I’m not going to get into the four types of conflict, or six, or however many it is now. I am going to talk about creating a believable antagonistic force, rather than one of those cardboard caricature, source-of-all-evil bad guys.
The concept of a having one person be the source of all of a story’s conflict has always seemed overly simple to me. Either the antagonist has help, or the protagonist’s problems are going to be disappointingly simple to solve. A lone enemy, unaided, is easy to overcome.