Watership Down political sensibilities of the 1990s when it was published. In 1978 Martin Rosen wrote and directed an animated film adaptation of "Watership Down". The voice cast included John Hurt, Richard Briers, Harry Andrews, Simon Cadell, Nigel Hawthorne, and Roy Kinnear. The film featured the song "Bright Eyes", sung by Art Garfunkel. Released as a single, the song became a UK number one hit. Although the essentials of the plot remained relatively unchanged, the film omitted several side plots. Though the Watership Down warren eventually grew to seventeen rabbits, with the additions of Strawberry, Holly, Bluebell, and three hutch rabbits liberated
Watership Down realm of terrors to bring back some boon to save himself and his people" is a powerful element in Adams's tale. This theme derives from the author's exposure to the works of mythologist Joseph Campbell, especially his study of comparative mythology, "The Hero with a Thousand Faces" (1949), and in particular, Campbell's "monomyth" theory, also based on Carl Jung's view of the unconscious mind, that "all the stories in the world are really one story." The concept of the hero has invited comparisons between "Watership Down's" characters and those in Homer's "Odyssey" and Virgil's "Aeneid". Hazel's courage, Bigwig's strength, Blackberry's