Fernandez-Armesto makes a short retrospect of the last thousand years of world history, in his new book suggests the urgency of resuming the pursuit of truth as old project widely shared by humanity. Against the relativists, subjectivists and postmodernists, for whom skepticism is a way of life, the author proceeds in a brilliant way to untangle the strands of human ingenuity, analyzing the forms according to which, historically and to some extent also, simultaneously, it is understood or tried to understand this universal human impulse.