It was so great a trial that we dared not, before this war, have contemplated it. The future of the human race was at stake; and the magnificent response that comes to us from every side reassures us fully as to the issue of other struggles, more formidable still, which no doubt await us when it will be a question no longer of fighting our fellow-men but rather of facing the more powerful and cruel of the great mysterious enemies that nature holds in reserve against us. If it be true, as I believe, that humanity is worth just as much as the sum total of latent heroism which it contains, then we may declare that humanity was never stronger nor more exemplary than now and that it is at this moment reaching one of its highest points and capable of braving everything and hoping everything. And it is for this reason that, despite our present sadness, we are entitled to congratulate ourselves and to rejoice. X ON RE-READING THUCYDIDES 1 At moments above all when history is in the making, in these times when great and as yet incomplete pages are being traced, pages by the side of which all that had already been written will pale, it is a good and salutary thing to turn to the past in search of instruction, warning and encouragement. In this respect, the unwearying and implacable war which Athens kept up against Sparta for twenty-seven years, with the hegemony of Greece for a stake, presents more than one analogy with that which we ourselves are waging and teaches lessons that should make us reflect. The counsels which it gives us are all the more precious, all the more striking or profound inasmuch as the war is narrated to us by a man who remains, with Tacitus, despite the striving of the centuries, the progress of life and all the opportunities of doing better, the greatest historian that the earth has ever known. Thucydides is in fact the supreme historian, at the same time swift and detailed, scrupulously sifting his evidence but giving free play to intuition, setting forth none but incontestable facts, yet divining the most secret intentions and embracing at a glance all the present and future political consequences of the events which he relates. He is withal one of the most perfect writers, one of the most admirable artists in the literature of mankind; and from this point of view, in an entirely different and almost antagonistic world, he has not an equal save Tacitus.