 The problem of time’s arrow was addressed by Castagnino, Lombardi and collaborators by elaborating on John Earman’s heresy (1974) according to which the arrow of time is a geometrical property of the universe (Castagnino, Lombardi, and Lara 2003). This global arrow is transferred to the local domain as an energy flow that points to the same time direction on the entire spacetime (Castagnino and Lombardi 2009), which in turn supplies the foundations for local irreversible theories (Aiello, Castagnino, and Lombardi 2008). Castagnino and Lombardi also collaborated with Manuel Gadella, one of the authors of the time-asymmetric quantum mechanics, in order to analyze irreversibility and time’s arrow in the quantum realm (Castagnino, Gadella, and Lombardi 2006), a work recently followed by Cristian López (2019).