Critics of the 2015 film Star Wars: Episode VII - The Force Awakens have called the film unoriginal and predictable because the story so closely mirrors the very first Star Wars film in 1977.For Luke the mentor is, of course, Obi-Wan, the friends are Han Solo and the robots R2D2 and C3PO and the enemy is Darth Vader inside the special world of the Death Star.Luke loses his mentor when he sees Darth Vader kill Obi-Wan, which helps him find the strength he needs later on. When heroes succeed, they return from the special world, changed by their experiences forever.Later editions of Campbell's book even featured Star Wars' hero Luke Skywalker on the front cover.When he finds Princess Leia's message to Obi-Wan Kenobi inside the robot R2D2, it is 'the call to adventure' that starts the hero on his journey.Luke takes his first steps to becoming a Jedi, and the hero myth restarts in The Return of the Jedi, except this time his mentor is Yoda.In his book, Campbell analyses myths from all over the world to describe the 'monomyth' - a pattern that you can see in myths from every culture.It's a tale that has been told for thousands of years, from the Ancient Greeks with The Odyssey to JK Rowling's Harry Potter books.