The title of this work: "About the unity of knowledge" is a permanent research program. The need to address this issue is clear. Suffice it, for our purposes, to allude to the different expressions with which the state of Western culture is alluded today: "Fragmentation of knowledge", "Unbeatable complexity", "Postmodernity", "Liquid modernity", "Posttruth", " Relativism", among many others. Through these phrases a complex problem is mentioned, of no small proportions and certainly real.