All over the world and all through history, wherever you have kings, dynasties invariably follow — at least until some nasty person ends them prematurely. I suppose over the course of the last several millennia, there may have been one or two gentle fellows who ruled a nation for thirty years and then thought, “Say, I’m not going to live forever, am I? Maybe the throne should go to the man who will do the best for my kingdom.”
Well, there may have been. I have no evidence of it. What happened instead was that — good, bad or indifferent — son replaced father if someone didn’t kill dad first.