But, as in the case of the philosophy of history in general, so also in this application of it to the history of philosophy, it is necessary to recognize the elements of truth. These lie in the works of genius in _historical characterization,_ which under this guise have been achieved by various thinkers and in various epochs of philosophy. Certainly Plato is not only transcendental, nor is Aristotle only immanentist; nor Kant only agnostic, nor Hegel only logical, nor Epicurus only materialist, nor Descartes only dualist; nor is Greek thought concerned only with objectivity, nor modern thought with subjectivity alone. But history takes shape as historical narrative, by noting the prominent traits of the various individuals and of the various epochs. Without this process it would be impossible to divide, to summarize, or to record it; without the introduction of empirical concepts, history could not be fixed in the memory.[1] By means of those characterizations, it also happens that historical names can be taken as symbols of truths and errors: all the crudity of dualism is expressed in Descartes, the paradox of determinism in Spinoza, that of abstract pluralism in Leibnitz. We owe (as is admitted by all those competent to judge) the elevation of the history of philosophy from a chronicle or an erudite collection to history properly so-called, to historians of philosophy who were tainted with philosophism. And since Hegel was the first and greatest of those historians, we must impute to Hegel the arbitrary act that he committed, but also the merit of having been the first to give a history of philosophy worthy of the name and accord to him all the more merit, in so far as he almost always corrected in execution the errors of his original plan.[2] [Sidenote: _Exact formula: identity of philosophy and of history._]