Transitions from rivalry to alliance within bilateral relationships have received considerable attention from historians of U.S. foreign relations. Or, more accurately, some alliances have received considerable attention; it remains unusual for works on inter-American relations to be cast principally as examinations of alliance politics. There are at least two interrelated reasons. First, the vast majority of the literature on the foreign relations of Latin American states analyzes cases where significant asymmetries of power exist. To be sure, vast differentials in political, economic, and military power can be found within alliances. But the alliance framework is more often applied to cases of countries where the imbalance is not dramatic. Second, in the English language literature in particular, relations between Latin American countries have been understudied. The overwhelming majority of the scholarship analyzes the role of great powers such as the United States or Great Britain. Consequently, the factors that have led regional adversaries to become allies have received less attention. U.S.-Latin American relations or Anglo-Latin American relations could, of course, be studied through the prism of rivalries and alliances, but the frameworks of empire and other varieties of hegemony have been more commonly utilized.
An eleven year old George Kennan began keeping a diary on January 1, 1916. At the very start of the diary he wrote “In this simple, little book, A record of the day I cast; So I afterwards may look back upon my happy past” (684). Due to Kennan’s remarkably lengthy and prolific career as a policymaker, diplomat, and scholar, as well as the undeniable impact he has had on the direction of American foreign policy during the Cold War, historians have long been attracted to studying his thoughts and actions. No one could ever plausibly claim that Kennan has been ‘understudied’ and his two volumes of memoirs also offered many personal insights into his inner thoughts. However, with the publication of Frank Costigliola’s edited collection of Kennan’s diaries from the period between 1916 and 2004, there is little doubt that scholars will continue to be fascinated by the complexities of Kennan’s life and career. It is a life that was certainly not simple and, despite all of his accomplishments and honors, the diaries make it abundantly clear that happiness was never Kennan’s dominant mood.