This book examines conflict resolution efforts in Latin America by the Organization of American States (OAS) over the past fifty years by exploring the relationship of the United States with other member states within the context of the OAS. The book focuses on the impact of institutional factors on the influence that member states are able to wield within the organization. This innovative theoretical approach yields general insights into organizational behaviour and interstate relations within an international organization. The examination of thirty-one cases provides a wealth of empirical data and facilitates cross case comparisons.