Till a subject has advanced as far as this, to speak of a science of it is an abuse of language. It is not enough to say that there must be a science of human things, because there is a science of all other things. This is like saying the planets must be inhabited, because the only planet of which we have any experience is inhabited. It may or may not be true, but it is not a practical question; it does not affect the practical treatment of the matter in hand.

Let us look at the history of Astronomy.

So long as sun, moon, and planets were supposed to be gods or angels; so long as the sword of Orion was not a metaphor, but a fact, and the groups of stars which inlaid the floor of heaven were the glittering trophies of the loves and wars of the Pantheon, so long there was no science of Astronomy. There was fancy, imagination, poetry, perhaps reverence, but no science. As soon, however, as it was observed that the stars retained their relative places—that the times of their rising and setting varied with the seasons—that sun, moon, and planets moved among them in a plane, and the belt of the Zodiac was marked out and divided, then a new order of things began. Traces of the earlier stage remained in the names of the signs and constellations, just as the Scandinavian mythology survives now in the names of the days of the week: but for all that, the understanding was now at work on the thing; Science had begun, and the first triumph of it was the power of foretelling the future. Eclipses were perceived to recur in cycles of nineteen years, and philosophers were able to say when an eclipse was to be looked for. The periods of the planets were determined. Theories were invented to account for their eccentricities; and, false as those theories might be, the position of the planets could be calculated with moderate certainty by them. The very first result of the science, in its most imperfect stage, was a power of foresight; and this was possible before any one true astronomical law had been discovered.

We should not therefore question the possibility of a science of history, because the explanations of its phenomena were rudimentary or imperfect: that they might be, and might long continue to be, and yet enough might be done to show that there was such a thing, and that it was not entirely without use. But how was it that in those rude days, with small knowledge of mathematics, and with no better instruments than flat walls and dial plates, those first astronomers made progress so considerable? Because, I suppose, the phenomena which they were observing recurred, for the most part, within moderate intervals; so that they could collect large experience within the compass of their natural lives: because days and months and years were measurable periods, and within them the more simple phenomena perpetually repeated themselves.

But how would it have been if, instead of turning on its axis once in twenty-four hours, the earth had taken a year about it; if the year had been nearly four hundred years; if man's life had been no longer than it is, and for the initial steps of astronomy there had been nothing to depend upon except observations recorded in history? How many ages would have passed, had this been our condition, before it would have occurred to any one, that, in what they saw night after night, there was any kind of order at all?

We can see to some extent how it would have been, by the present state of those parts of the science which in fact depend on remote recorded observations. The movements of the comets are still extremely uncertain. The times of their return can be calculated only with the greatest vagueness.

And yet such a hypothesis as I have suggested would but inadequately express the position in which we are in fact placed towards history. There the phenomena never repeat themselves. There we are dependent wholly on the record of things said to have happened once, but which never happen or can happen a second time. There no experiment is possible; we can watch for no recurring fact to test the worth of our conjectures. It has been suggested, fancifully, that if we consider the universe to be infinite, time is the same as eternity, and the past is perpetually present. Light takes nine years to come to us from Sirius; those rays which we may see to-night when we leave this place, left Sirius nine years ago; and could the inhabitants of Sirius see the earth at this moment, they would see the English army in the trenches before Sebastopol; Florence Nightingale watching at Scutari over the wounded at Inkermann; and the peace of England undisturbed by 'Essays and Reviews.'

As the stars recede into distance, so time recedes with them, and there may be, and probably are, stars from which Noah might be seen stepping into the ark, Eve listening to the temptation of the serpent, or that older race, eating the oysters and leaving the shell-heaps behind them, when the Baltic was an open sea.

Could we but compare notes, something might be done; but of this there is no present hope, and without it there will be no science of history. Eclipses, recorded in ancient books, can be verified by calculation, and lost dates can be recovered by them, and we can foresee by the laws which they follow when there will be eclipses again. Will a time ever be when the lost secret of the foundation of Rome can be recovered by historic laws? If not, where is our science? It may be said that this is a particular fact, that we can deal satisfactorily with general phenomena affecting eras and cycles. Well, then, let us take some general phenomenon. Mahometanism, for instance, or Buddhism. Those are large enough. Can you imagine a science which would have[A] foretold such movements as those? The state of things out of which they rose is obscure; but suppose it not obscure, can you conceive that, with any amount of historical insight into the old Oriental beliefs, you could have seen that they were about to transform themselves into those particular forms and no other?

It is not enough to say, that, after the fact, you can understand partially how Mahometanism came to be. All historians worth the name have told us something about that. But when we talk of science, we mean something with more ambitious pretences, we mean something which can foresee as well as explain; and, thus looked at, to state the problem is to show its absurdity. As little could the wisest man have foreseen this mighty revolution, as thirty years ago such a thing as Mormonism could have been anticipated in America; as little as it could have been foreseen that table-turning and spirit-rapping would have been an outcome of the scientific culture of England in the nineteenth century.