The collaborators of this issue of the Revista Mexicana de Política Exterior, all of them recognized specialists in Mexican-American relations, have wanted, based on their own perceptions, to share their knowledge of the subject and raise several of their personal concerns. Thus, the comprehensive and historical vision of these relationships is offered; both the difficult moments and the times when the flow was smoother are also highlighted. In addition, attention is focused on two aspects of enormous relevance: the energy relationship and the commercial relationship. In addition to these essays, a brief note on the constitutive meeting of the Action Committee for the Economic and Social Development of Central America (CADESCA) of SELA is included. In the "Address and Documents" section, the inclusion of the Contadora Act for Peace and Cooperation in Central America stands out, in the revised version, which the representatives of the countries that make up the Contadora Group delivered to the governments of the five countries of the region on September 7, 1984.