This issue of the Revista Mexicana de Política Exterior is dedicated to highlighting the valuable work carried out in multiple fields by the world's leading Organization. To this end, the Essays section reproduces the papers originally presented on the occasion of the commemorative act of the XLII anniversary of the United Nations, held in the Auditorium of the Ministry of Foreign Affairs in October 1987. A document on the Rapacki Plan is also included, a series of pronouncements of the Mexican diplomacy and the document "Mexico and international cooperation", which accounts for the wide range of actions that the country has undertaken and crystallized in this field.