Does Shrek have a hidden message? A fifth film in the series has just been announced. Many critics attribute the film's success to its underlying philosophy.
Grumpy green ogre to return next year

Glossary
Voiceover - A narrator talking over a video.
Villain - An evil person in a book or film.
Ogre - In folklore, a man-eating giant.
Self-acceptance - The ability to accept yourself as you are now, including any faults or flaws you may have.
Libertarian - A political philosophy that stresses personal freedom above all else.
Marxist - A supporter of the left-wing political, economic and philosophical ideas of Karl Marx.
Moral - Concerned with what is right and wrong.