Abstract
This chapter introduces the book, describing its outline and reviewing its central findings. It also establishes three important points. First, it describes how making a difference, properly using the opportunity to make history, motivates presidents. Second, it underscores the necessity of analyzing process - how decision-makers interact - in evaluating effectiveness. Third, it describes how focusing on a single administration produces a wealth of data for analysis - in hundreds of recorded meetings and phone conversations, in thousands of incidents of administration bargaining. (12 pages)