How do you make your way in a world that is changing at an unprecedented rate? Why do we have less and less time? Why are some people unfaithful? How can our government act against threats before they happen? This book is about change - from the small and seemingly insignificant transitions in our day-to-day lives, to the big and almost incomprehensible shifts in human history. Drawing on expert advice and often complex theories, the authors of the bestselling The Decision Book present fifty simple and effective models to help us make sense of change in our world. Change is happening all around us, in every sphere from the personal and political to economics and the environment. In The Change Book you'll find models explaining the financial crisis, why biotechnology is the industry of the future and why cities are the new nations. Whether you're buying a new car, deciding who to vote for, or making an investment, this little black book will offer surprisingly simple explanations of our complicated world - and radically challenge some of your preconceived ideas.