George Lucas' epic space opera Star Wars was released theatrically on May 25, 1977. It became a financial triumph (by earning a total of $775 million and becoming the third highest-grossing film, when adjusted for inflation) and a critical success (by receiving ten Oscar nominations, including Best Picture, and winning seven).
I assume that George Lucas was influenced by previous movies/books. Can you name where some of those exact inspirations have originated from?