Book excerpt: In this balanced and thought-provoking study, Russell Crandall examines the American decision to intervene militarily in three key episodes in American foreign policy: the Dominican Republic, Grenada, and Panama. Drawing upon previously classified intelligence sources and interviews with policymakers, Crandall analyzes the complex deliberations and motives behind each intervention and shows how the decision to intervene was driven by a perceived threat to American national security. By bringing together three important cases, Gunboat Democracy makes it possible to interpret and compare these examples and study the political systems left in the wake of intervention. Particularly salient in today's foreign policy arena, this work holds important lessons for questions of regime change and democracy by force.