But in spite of all this Vico has never had justice done him in works devoted to the history of modern philosophy. These, in the case both of Höffding's book and of the greatly superior work of Windelband, and in fact of all others, either pass over the Italian philosopher in complete silence or else merely mention him as an experimenter, later than Bossuet and earlier than Herder, in the dubious science of the "philosophy of history." This lack of attention arises partly from an insufficient knowledge of Vico's real nature; his fertile activities in the theory of knowledge, in ethics, in aesthetic, in law and in religion are all hidden behind that one label "philosopher of history." Partly however it is due to the reaction of the history of politics and culture on the history of philosophy; which produces the effect that thinkers whose social influence came to an end with the fall of the peoples or states to which they belonged, or who for some reason or other had no considerable influence on European civilisation, are sacrificed to others much less important from a philosophical point of view but more influential or better known as exponents of social life and representatives of cultural tendencies; so that where it would be thought impossible to ignore, for example, Paley or d'Holbach or Mendelssohn, it seems natural to pass over Giambattista Vico, though in such company he is a giant among pigmies. The historical injustice of this course has been already shown theoretically by the distinction we have emphasised between the history of philosophy and the history of culture; and in Vico's special case by our whole work, which clearly shows the lacuna left by the omission of Vico in the general history of European thought at the beginning of the eighteenth century. [Footnote 1: This appendix briefly recapitulates the chief results of my researches into the subject set forth in the _Bibliografia vichiana_ and its two supplements (cf. the present volume, _infra,_ p. 310, to which work I refer for fuller details and for the evidence for the facts here laid down.] [Footnote 2: See above, pp. 236, 237.] [Footnote 3: Labanca has devoted a highly instructive volume to the Catholic criticisms of Vico: see the present volume, _infra,_ p. 309.] [Footnote 4: See above, pp. 247-9.] APPENDIX III THE SOURCES OF VICO'S THEORY OF KNOWLEDGE[1] My statement, that the criterion of knowledge contained in Vico's formula of the conversion of the true with the created is an original and modern principle, has been contradicted by certain Catholic editors; who state that this doctrine, however true, is not original to Vico, and is indeed far from modern, being a purely Scholastic doctrine. If I thought otherwise, this was only due to my insufficient knowledge of Scholasticism.