Many Bothans died to bring us this information.—Mon Mothma, Return of the Jedi
The ancient Greeks told stories of gods and heroes to explain the world as well as to make the long winter nights fly by. Tales of epic wars, capricious gods, valiant demigods, and bold deeds created the mythology now taught in schools and used as clue fodder for Jeopardy. The word mythos is Greek for any kind of story but the idea of a myth has come to mean something larger, a story about extraordinary happenings, extraordinary people, in extraordinary times.
While the Greek stories – and the Roman, Indian, Norse, Egyptian, African, etc. – took hundreds of years to percolate into tales that are now thousands of years old, there are emerging mythologies in today’s culture mere decades old. Yet, if you play the game of “what is a mythology,” it’s easy to claim that Star Wars is crossing from a collection of movie plots into the realm of mythology.
A myth is any traditional story consisting of events that are ostensibly historical, though often supernatural, explaining the origins of a cultural practice or natural phenomenon. Myths are often stories that are currently understood as being exaggerated or fictitious. – Wikipedia