With the minor differences which, occurring in all matters of opinion, nowhere multiply so fast and subdivide themselves so minutely as in questions of philosophy, there has been of late a general agreement to trace the germ of the modern division of Æsthetics to Descartes.[257] To discuss this at any length would be quite improper here: but no one who has the least acquaintance with the Cartesian philosophy can fail to see how naturally—nay, how inevitably—both the general principle of that philosophy in its reduction and rallying of everything to conditions of abstract idea and thought, and its particular insistence on clearness of definition and the like in Method, should lead to a reconsideration and further exploration of the idea of Beauty, literary and other. There is also no doubt that, in the next generation or generations, the developments of Cartesianism and the revolts against it might, nay, must, affect powerfully these applications of abstract thought to the remoter principles of literature. We have seen that Locke in England, Philistine as he himself was in regard to letters, and especially to poetry, had a very strong influence upon Addison,—an influence which he continued to exercise, both through Addison and independently, almost throughout the English eighteenth century. There is no doubt that in France the Père André, whom we shall mention presently, was a direct descendant of Descartes through Malebranche. In Italy the singular and solitary figure of Vico, though it exercised at first no influence, has been claimed as having a new and powerful influence to exercise in this direction as in others. And it is not disputable that Descartes begat Leibnitz or that Leibnitz begat Wolff, to whose philosophical system almost all competent judgment agrees in tracing the direct origin of German æsthetic, in Breitinger, in Baumgarten, and the rest. [Sidenote: _In Germany: negative as well as positive inducements._]