The affirmative part of the ideas of Comte was this: what can be done is to make a classification of sciences and a philosophy of history. The classification of sciences according to Comte, proceeding from the most simple to the most complex--that is, from mathematics to astronomy, physics, chemistry, biology to end at sociology, is generally considered by the learned as interesting but arbitrary. The philosophy of history, according to Comte, is this: humanity passes through three states: theological, metaphysical, positive. The theological state (antiquity) consists in man explaining everything by continual miracles; the metaphysical state (modern times) consists in man explaining everything by ideas, which he still continues to consider somewhat as beings, by abstractions, entities, vital principle, attraction, gravitation, soul, faculty of the soul, etc. The positive state consists in that man explains and will explain all things, or rather limits himself and will limit himself to verifying them, by the links that he will see they have with one another, links he will content himself with observing and subsequently with controlling by experiment. Also there is always something of the succeeding state in the preceding state and the ancients did not ignore observation, and there is always something of the preceding state in the succeeding state and we have still theological and metaphysical habits of mind, theological and metaphysical "residues," and perhaps it will be always thus; but for theology to decline before metaphysics and metaphysics before science is progress. Over and above this, Comte in the last portion of his life--as if to prove his doctrine of residues and to furnish an example--founded a sort of religion, a pseudo-religion, the religion of humanity. Humanity must be worshipped in its slow ascent towards intellectual and moral perfection (and, in consequence, we should specially worship humanity to come; but Comte might reply that humanity past and present is venerable because it bears in its womb the humanity of the future). The worship of this new religion is the commemoration and veneration of the dead. These last conceptions, fruits of the sensibility and of the imagination of Auguste Comte, have no relation with the basis of his doctrine. RENOUVIER.--After him, by a vigorous reaction, Renouvier restored the philosophy of Kant, depriving it of its too symmetrical, too minutely systematic, too scholastic character and bringing it nearer to facts; from him was to come the doctrine already mentioned, "pragmatism," which measures the truth of every idea by the moral consequence that it contains.