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 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 toward 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 calculations, 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[1] 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,
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