In the five foregoing parts of this work, our investigation proceeded on an ascertained and undisputed scientific basis; and our business was to exhibit the progress made in each science; to free it from entanglement with the ancient philosophy; and to show what further improvements might be anticipated. Our task is a different, and a much harder one, in the case of the sixth and last science that I am about to treat of. The theories of Social science are still, even in the minds of the best thinkers, completely implicated with the theologico-metaphysical philosophy; and are even supposed to be, by a fatal separation from all other science, condemned to remain so involved for ever. The philosophical procedure which I have undertaken to carry through becomes more difficult and bold, from this point onwards, without at all changing its nature or object; and it must so far present a new character as it must henceforth be employed in creating a wholly new order of scientific conceptions, instead of judging, arranging, and improving such as already existed.

It is not to be expected that this new science can be at once raised to a level with even the most imperfect of those which we have been reviewing. All that can be rationally proposed in our day is to recognize the character of positivity in social as in all other science, and to ascertain the chief bases on which it is founded; but this is enough, as I hope to show, to satisfy our most urgent intellectual necessities, and even the most imperative needs of immediate social practice.