In this issue of the Revista Mexicana de Política Exterior, a series of articles and documents are presented in which central issues of foreign policy and the international context are dealt with in depth. More than integrating a thematic unit, they constitute an important common thread that allows raising current concerns and reflections, whether we look at the history of Mexico, or if we direct it to the contemporary reality of the country, Latin America or the world in general. . The coincident perception in the essays included here about the problems that Mexico has had and must face and solve, with creative diplomatic options of regional and global scope, that contribute to the logo of international peace and security and that at the same time defend the interests of the nation, constitute the backbone of this edition. In the "Notes and reports" section, the Treaty of Peace, Friendship and Trade between the Republics of Guatemala, Costa Rica, Honduras, Nicaragua and El Salvador, signed in 1887, is presented. This document reflects the historical desires for cooperation, peace and regional unity; with the hope that the insistence on a common past and the drive to build a Central American homeland will generate not only a feeling of nostalgia but, above all, a propitious framework so that, through a broad and genuine spirit of cooperation, security is achieved and peace is established in this area.