Now, what is important in Thucydides, as evinced in the treatment of legend generally, is not the results he arrived at, but the method by which he works. The first great rationalistic historian, he may be said to have paved the way for all those who followed after him, though it must always be remembered that, while the total absence in his pages of all the mystical paraphernalia of the supernatural theory of life is an advance in the progress of rationalism, and an era in scientific history, whose importance could never be over-estimated, yet we find along with it a total absence of any mention of those various social and economical forces which form such important factors in the evolution of the world, and to which Herodotus rightly gave great prominence in his immortal work. The history of Thucydides is essentially one-sided and incomplete. The intricate details of sieges and battles, subjects with which the historian proper has really nothing to do except so far as they may throw light on the spirit of the age, we would readily exchange for some notice of the condition of private society in Athens, or the influence and position of women. There is an advance in the method of historical criticism; there is an advance in the conception and motive of history itself; for in Thucydides we may discern that natural reaction against the intrusion of didactic and theological considerations into the sphere of the pure intellect, the spirit of which may be found in the Euripidean treatment of tragedy and the later schools of art, as well as in the Platonic conception of science. History, no doubt, has splendid lessons for our instruction, just as all good art comes to us as the herald of the noblest truth. But, to set before either the painter or the historian the inculcation of moral lessons as an aim to be consciously pursued, is to miss entirely the true motive and characteristic both of art and history, which is in the one case the creation of beauty, in the other the discovery of the laws of the evolution of progress: _Il ne faut demander de l’Art que l’Art_, _du passé que le passé_. Herodotus wrote to illustrate the wonderful ways of Providence and the nemesis that falls on sin, and his work is a good example of the truth that nothing can dispense with criticism so much as a moral aim. Thucydides has no creed to preach, no doctrine to prove. He analyses the results which follow inevitably from certain antecedents, in order that on a recurrence of the same crisis men may know how to act.