To expand on Whiskeyjack's post above, Lucas is influential, Lucas Films is influential, THX is influential and have mostly been influential through Hollywood and into the general cult of personality. Below is a small image that can be found in greater detail at the below link.
How Star Wars Changed the World
I see very little influence of the movies on other movies other than special effects and production methods associated with Skywalker Ranch. That being said, Lucas readily admits that Akira Kurosawas films were significantly influential on the Star Wars Episodes IV-VI. And as Whiskeyjack stated, Kurosawa's films are vairous takes on the monomyth theme set in fuedal Japan.
Now there are deep ideas in Star Wars such as the duality theme and also Luke's transition through yin and yang:
White clothing, innocence, ignorance
Grey clothing, discovery of feelings, pain (mental and physical), knowledge of loss (mental and physical)
Acceptance, confidence, masculine, hard soul.
They took some artistic license as white is typically associated with the masculine and yang is black or passive, however he adapted it to fit the story in terms of western understanding of light and dark, good and evil.
This is not exclusive nor proprietary to Star Wars, but oriental culture which Lucas drew upon heavily to tell his story of redemption.
