Game theory helps us understand how people make decisions in different situations. It looks at how players interact and make choices that benefit themselves. In some cases, players work together for the best outcome for everyone. This is called cooperative game theory. However, this book focuses on non-cooperative game theory, where players act independently. This means they don't work together and make decisions based on their own interests. The book will not cover cooperative game theory, but will explore how players make choices without cooperation.