This second expanded edition of Instruments and regimes of international cooperation has been opened to the collaboration of notorious Spanish and Latin American public international law specialists. It does not only serve a pedagogical purpose, but it is also aimed at university experts, so that the texts and materials it includes serve students and professors from other legal branches, seeking a deeper knowledge of sectors of the international order that are increasingly decisive. in the present era of globalization. Special attention is given to legal developments in the area of ​​international protection of human rights, protection of the environment, disarmament and the use of force, irregular migrations and international economic relations. However, the variety and richness of the contributions, without being exclusive of the erudition of specialists, adds other important topics. Scientific openness, universality and affirmation of one's own are combined in this volume, whose ambition is to help present Spanish practice and boost Spain's external action to the rightful place in the international community.