Owing to their failure to realize spiritual value as the immanent progressive force in history, even the loftiest of the ancient historians were not able to maintain the unity and autonomy of historiographical work, which in other respects they had discovered and asserted. Although they had penetrated the deception exercised by those histories that are really poetry, or lies and partisanship, or collections of material and unintelligent piling up of erudition, or instruments of pleasure, affording marvel for simple folk, yet they were on the other hand incapable of ever setting themselves free of the preconception of history as directed to an end of edification and chiefly of instruction. This real heteronomy then appeared to be autonomy. They are all agreed as to this: Thucydides proposed to narrate past events in order to predict from them future events, identical or similar, the perpetual return of human fortunes; Polybius sought out the causes of facts in order that he might apply them to analogous cases, and held those unexpected events to be of inferior importance whose irregularities place them outside rules; Tacitus, in conformity with his chief interest, which was rather moralistic than social or political, held his chief end to be the collection of facts notable for the vice or virtue which they contained, _ne virtutes sileantur utque pravis dictis factìsque ex posteritate et infamia metus sit._ Behind them came all the minor historians, all the hypocrites, who repeated by imitation or involuntary echo or false unction and in a superficial way what in the greater writers was the result of profound thought, as, for instance, the Sallusts, the Diogenes, the Diodori, the Plutarchs, and those that resemble them. Then there were all the extractors of historical quintessences, of memorable deeds and words of statesmen, captains, and philosophers, and even of women (the γυναικῶν ἀρεταί). Ancient historiography has been called 'pragmatical,' and such it is, in the double sense of the word, ancient and modern: in so far as it limits itself to the earthly side of things and especially to the political (the 'pragmatic' of Polybius), and in so far as it adorns them with reflections and advice (the 'apodictic' of the same historian-theorist).