Creativity is now being recognised as the key skill of the modern age both personally and professionally. Yet unlike all the other areas of human thought and research - biology, physics, psychology and more - there has never really been a theory of creativity, one that suggests a big answer to the question of how people think creatively. The Creativity Code puts forward the first unified theory of creativity, called generator theory. It aims to explain creativity in all walks of life, from art and design to technology, science, modern business and more. Generator theory is as surprising as it is radical, showing that the secret to creativity is hiding in plain view, encoded in something of which we all have deep knowledge - and have done since we were children.