[Sidenote] _History and the criterion of progress._ Every form of human history has the concept of _progress_ for foundation. But by progress must not be understood the imaginary and metaphysical _law of progress_, which should lead the generations of man with irresistible force to some unknown destiny, according to a providential plan which we can logically divine and understand. A supposed law of this sort is the negation of history itself, of that accidentality, that empiricity, that contingency, which distinguish the concrete fact from the abstraction. And for the same reason, progress has nothing to do with the so-called _law of evolution_. If evolution mean the concrete fact of reality which evolves (that is, which is reality), it is not a law. If, on the other hand, it be a law, it becomes confounded with the law of progress in the sense just described. The progress of which we speak here, is nothing but the _concept of human activity itself_, which, working upon the material supplied to it by nature, conquers obstacles and bends nature to its own ends. Such conception of progress, that is to say, of human activity applied to a given material, is the _point of view_ of the historian of humanity. No one but a mere collector of stray facts, a simple seeker, or an incoherent chronicler, can put together the smallest narrative of human deeds, unless he have a definite point of view, that is to say, an intimate personal conviction regarding the conception of the facts which he has undertaken to relate. The historical work of art cannot be achieved among the confused and discordant mass of crude facts, save by means of this point of view, which makes it possible to carve a definite figure from that rough and incoherent mass. The historian of a practical action should know what is economy and what morality; the historian of mathematics, what are mathematics; the historian of botany, what is botany; the historian of philosophy, what is philosophy. But if he do not really know these things, he must at least have the illusion of knowing them; otherwise he will never be able to delude himself that he is writing history.