And while admitting the necessity of a psychological basis for the philosophy of history, he added to it the important truth that man, to be apprehended in his proper position in the universe as well as in his natural powers, must be studied from below in the hierarchical progression of higher function from the lower forms of life. The important maxim, that to obtain a clear conception of anything we must 'study it in its growth from the very beginning' is formally set down in the opening of the Politics, where, indeed, we shall find the other characteristic features of the modern Evolutionary theory, such as the 'Differentiation of Function' and the 'Survival of the Fittest' explicitly set forth. What a valuable step this was in the improvement of the method of historical criticism it is needless to point out. By it, one may say, the true thread was given to guide one's steps through the bewildering labyrinth of facts. For history (to use terms with which Aristotle has made us familiar) may be looked at from two essentially different standpoints; either as a work of art whose [Greek] or final cause is external to it and imposed on it from without; or as an organism containing the law of its own development in itself, and working out its perfection merely by the fact of being what it is. Now, if we adopt the former, which we may style the theological view, we shall be in continual danger of tripping into the pitfall of some a priori conclusion--that bourne from which, it has been truly said, no traveller ever returns. The latter is the only scientific theory and was apprehended in its fulness by Aristotle, whose application of the inductive method to history, and whose employment of the evolutionary theory of humanity, show that he was conscious that the philosophy of history is nothing separate from the facts of history but is contained in them, and that the rational law of the complex phenomena of life, like the ideal in the world of thought, is to be reached through the facts, not superimposed on them-- [Greek] not [Greek]. And finally, in estimating the enormous debt which the science of historical criticism owes to Aristotle, we must not pass over his attitude towards those two great difficulties in the formation of a philosophy of history on which I have touched above. I mean the assertion of extra-natural interference with the normal development of the world and of the incalculable influence exercised by the power of free will. Now, as regards the former, he may be said to have neglected it entirely. The special acts of providence proceeding from God's immediate government of the world, which Herodotus saw as mighty landmarks in history, would have been to him essentially disturbing elements in that universal reign of law, the extent of whose limitless empire he of all the great thinkers of antiquity was the first explicitly to recognise.