Concreta 15 (Spring 2020) arises from the following question, can we wish for the end of a world?And it goes through various scenarios imagined by dystopian narratives or scientific projections that are beginning to creep into our social, economic and political realities whose exhaustion announces a new horizon and confronts a new order. It is published by Caja Negra with the collaboration of Yuk Hui, Leo Felipe, Naief Yehya, Jack Halberstam, Julia Volpato, Alejo Ponce de León, Juliana Huxtable, criticdias, José Esteban Muñoz, Paolo Tavares, Zoe Leonard, Lucrecia Masson, Moira Miyan, Santiago Villanueva, Sofía Dourron, aliwen, Paco Chavinet and Lina Meruane.