What is wrong with economics? Why did so few economists warn that the apparent good times could not last? Paul Ormerod is well known for his first book, published almost 20 years ago, called The Death of Economics. His latest effort, Positive Linking: How Networks and Incentives Can Revolutionise the World, explores the complexity of the modern world. Paul Ormerod and Peter Day discuss how keeping things simple may have led us to the financial mess the world is stuck in today.