Now at the birth of this great conception science, it is true, presided, yet religion it was which at the outset clothed it in its own garb, and familiarised men with it by appealing to their hearts first and then to their intellects; knowing that at the beginning of things it is through the moral nature, and not through the intellectual, that great truths are spread. So in Herodotus, who may be taken as a representative of the orthodox tone of thought, the idea of the uniform sequence of cause and effect appears under the theological aspect of Nemesis and Providence, which is really the scientific conception of law, only it is viewed from an _ethical_ standpoint. Now in Thucydides the philosophy of history rests on the probability, which the uniformity of human nature affords us, that the future will in the course of human things resemble the past, if not reproduce it. He appears to contemplate a recurrence of the phenomena of history as equally certain with a return of the epidemic of the Great Plague. Notwithstanding what German critics have written on the subject, we must beware of regarding this conception as a mere reproduction of that cyclic theory of events which sees in the world nothing but the regular rotation of Strophe and Antistrophe, in the eternal choir of life and death. For, in his remarks on the excesses of the Corcyrean Revolution, Thucydides distinctly rests his idea of the recurrence of history on the psychological grounds of the general sameness of mankind. ‘The sufferings,’ he says, ‘which revolution entailed upon the cities were many and terrible, such as have occurred and always will occurs as long as human nature remains the same, though in a severer or milder form, and varying in their symptoms according to the variety of the particular cases. ‘In peace and prosperity states and individuals have better sentiments, because they are not confronted with imperious necessities; but war takes away the easy supply of men’s wants, and so proves a hard taskmaster, which brings most men’s characters to a level with their fortunes.’ IV IT is evident that here Thucydides is ready to admit the variety of manifestations which external causes bring about in their workings on the uniform character of the nature of man. Yet, after all is said, these are perhaps but very general statements: the ordinary effects of peace and war are dwelt on, but there is no real analysis of the immediate causes and general laws of the phenomena of life, nor does Thucydides seem to recognise the truth that if humanity proceeds in circles, the circles are always widening.