Psychology? Why would anyone study psychology? Well, one good reason is that psychology influences so many areas and people – and you can use even a little knowledge of psychology (perhaps this book) to improve your life as well as the world around you! In this chapter, we’ll explore some of the ways psychology has positively influenced – and continues to influence – the world. In so doing, we’ll also set the stage for the rest of this book, which is a practical guide for making informed decisions and preparing for a successful life that includes meaningful work – yes, using psychology! We’ll also provide an introduction to career options in psychology and the chance to reflect and consider how psychology might help you achieve your goals.