As a result of this double but converging negation, it is also advisable to refute a common and deeply rooted belief (which we ourselves at one time shared to some extent)[3] that we should arrive at the re-establishment of the universality of the fancy: or that there are some among the special histories, constituted according to the various forms of the spirit (general and individual only in so far as every form of the spirit is the whole spirit in that form), which require universal treatment and others only treatment as monographs. The typical instance generally adduced is that of the difference between the history of philosophy and the history of poetry or of art. The subject of the former is supposed to be the one great philosophical problem that interests all men, of the latter the sentimental or imaginative problems of particular moments, or at the most of particular artists. Thus the former is supposed to be continuous, the latter discontinuous, the former capable of complete universal vision, the second only of a sequence of particular visions. But a more 'realistic' conception of philosophy deprives it of this privilege as compared with the history of art and poetry or of any other special history; for, appearances notwithstanding, it is not true that men have concentrated upon one philosophical problem only, whose successive solutions, less and less inadequate, compose a single line of progress, the universal history of the human spirit, affording support and unification to all other histories. The opposite is the truth: the philosophical problems that men have treated of and will treat of are infinite, and each one of them is always particularly and individually determined. The illusion as to the uniqueness of the problem is due to logical misapprehension, increased by historical contingencies, whence a problem which owing to religious motives seemed supreme has been looked upon as unique or fundamental, and groupings and generalizations made for practical ends have been held to be real identity and unity.[4] 'Universal' histories of philosophy, too, like the others, when we examine them with a good magnifying glass, are revealed as either particular histories of the problem that engages the philosopher-historian, or arbitrary artificial constructions, or tables and collections of many different historical sequences, in the manner of a manual or encyclopædia of philosophical history. Certainly nothing forbids the composition of abridgments of philosophical histories, containing classifications of particular problems and representing the principal thinkers of all peoples and of all times as occupied with one or another class of problem. This, however, is always a chroniclistical and naturalistic method of treating the history of philosophy, which only really lives when a new thinker connects the problems already set in the past and its intrinsic antecedents with the definite problem that occupies his attention.