"Tragedy and the Common Man"

One cannot write a tragedy without believing in the common man. A story will not be good if the hero starts out superior, doesn't learn anything, and defys all odds easily. The "hero" in fact, should be based around the common man. He must have flaws, he must overcome hard obstacles, and he must LEARN! If one does not believe in the common man, there will be no story. Take any tragedy and analyze that hero. Does he seem realistic? Does he have issues to resolve? Does he learn? Does he have flaws like everyone else? The answer to all of these should be yes. No matter what you're writing about, you must have a realistic character. Sure they can become superior at the end, but overall, they're just a common man.