Another circumstance which led Aristotle to disregard the happy aperçus of earlier philosophers was his vast superiority to them in positive knowledge. It never occurred to him that their sagacity might be greater than his, precisely because its exercise was less impeded by the labour of acquiring and retaining such immense masses of irrelevant facts. And his confidence was still further enhanced by the conviction that all previous systems were absorbed into his own, their scattered truths co-ordinated, their aberrations corrected, and their discords reconciled. But in striking a general average of existing philosophies, he was in reality bringing them back to that anonymous philosophy which is embodied in common language and common opinion. And if he afterwards ruled the minds of men with a more despotic sway than any other intellectual master, it was because he gave an organised expression to the principle of authority, which, if it could, would stereotype and perpetuate the existing type of civilisation for all time. Here, then, are three main points of distinction between our philosopher and his precursors, the advantage being, so far, entirely on their side. He did not, like the Ionian physiologists, anticipate in outline our theories of evolution. He held that the cosmos had always been, by the strictest necessity, arranged in the same manner; the starry revolutions never changing; the four elements preserving a constant balance; the earth always solid; land and water always distributed according to their present proportions; living species transmitting the same unalterable type through an infinite series of generations; the human race enjoying an eternal duration, but from time to time losing all its conquests in some great physical catastrophe, and obliged to begin over again with the depressing consciousness that nothing could be devised which had not been thought of an infinite number of times already; the existing distinctions between Hellenes and barbarians, masters and slaves, men and women, grounded on everlasting necessities of nature. He did not, like Democritus, distinguish between objective and subjective properties of matter; nor admit that void space extends to infinity round the starry sphere, and honeycombs the objects which seem most incompressible and continuous to our senses. He did not hope, like Socrates, for the regeneration of the individual, nor, like Plato, for the regeneration of the race, by enlightened thought. It seemed as if Philosophy, abdicating her high function, and obstructing the paths which she had first opened, were now content to systematise the forces of prejudice, blindness, immobility, and despair.