Game theory is central to understanding human behavior and relevant to all of the behavioral sciences—from biology and economics, to anthropology and political science. However, as this book demonstrates, game theory alone cannot fully explain human behavior and should instead complement other key concepts championed by the behavioral disciplines. The book shows that just as game theory without broader social theory is merely technical bravado, so social theory without game theory is a hindered enterprise. The book is a combination of a text book on game theory and a plea to use behavioral game theory as a unifying tool in all behavioral sciences. This edition has been thoroughly revised and updated. Reinvigorating game theory, the book offers innovative thinking for the behavioral sciences.