The Introduction lays out the groundwork for the book. It introduces the topic and the author’s argument, provides an overview of the problem at hand, and surveys the existing literature. The book argues that far from a clear and complete break from the past, Iran’s security thinking and policies since the Islamic Revolution have been marked by key elements of continuity. This continuity, Tabatabai posits, is due to the country’s lessons learned from its historical experiences, to include war and peace, as well as diplomatic efforts, which have shaped the contours of Iranian decision-makers’ thinking for generations.