The whole development of Kant's thought up to this point is intelligible when regarded from the Leibnitzian point of view, with which he started.
The fundamental question for philosophic reflection presented itself to him in the form which it had assumed in the hands of Locke and his successors in England, of Leibnitz and the Leibnitzian school in Germany.
Herbart and Lotze, both deeply affected by the Leibnitzian hypothesis of indivisible monads, supposed that man's soul is seated at a central point in the brain; and Lotze supposed that this supposition is necessary to explain the unity of consciousness.
Beside the Dilucidationes, he wrote: - De harmonia animi et corporis humani commentatio (Frankfort and Leipzig, 1735; Tubingen, 1741); De origine et permissione mall (1724), an account of the Leibnitzian theodicy.
Pope sur l'homme (1737, an attack on the Leibnitzian theory of that poem), Logique (6 vols., 1741), De l'esprit humain (1741), and Reflexions sur l'ouvrage intitule: La Belle Wolfienne (1743).
Secondly, he accepted the Leibnitzian hypothesis of immaterial elements without accepting their self-action.
Also the following works are of importance, though not all expressly expounding the Leibnitzian point of view: cf.
Kant, indeed, was mainly influenced by his strong opposition to the Leibnitzian rationalism, and therefore assigns the categories to understanding, the logical faculty, without consideration of the question, - which might have been suggested by the previous statements of the Dissertation, - what relation these categories held to the empirical notions formed by comparison, abstraction and generalization when directed upon representations of objects.
By means of the doctrine of the quantification of the predicate, in which with his Leibnitzian conception of identity he anticipated Beneke and Hamilton alike, universal and particular judgments are made to pull together.
No realists, they came nearer to Spinozistic pantheism and to Leibnitzian monadism, but only on their idealistic side; for they would not allow that extension and body are different from thinking and mind.