About the Book: This accessible introduction to game theory explains how strategic decision-making shapes everyday life, from business and politics to environmental challenges and international relations. Through twenty-one practical lessons and engaging real-world examples, the book dispels the myth that game theory is only about competition, revealing its powerful role in fostering cooperation, trust, and mutually beneficial outcomes. Covering topics such as negotiation, conflict, public policy, and collective decision-making, it demonstrates how understanding incentives and human behaviour can lead to better choices. Ideal for general readers, this insightful guide highlights the practical value of game theory in creating a more collaborative world.