He is recognized as the founder of the "neo-Leibnizian" movement in Russia, which involved updating the ideas of philosopher Gottfried Wilhelm Leibniz, as well as the works of R.H. Lotze and Gustav Teichmüller.
[3] Kozlov was drawn to the ideas of Ludwig Feuerbach and Charles Fourier, which led him to develop socialist views.
[2] Kozlov delved into philosophy in the 1870s, influenced successively by Arthur Schopenhauer, Eduard von Hartmann, and Immanuel Kant.
[2] During this time, he developed his own mature position under the influence of Leibniz and his followers, such as Hermann Lotze and Gustav Teichmüller.
Kozlov was an advocate for a panpsychist metaphysics and developed a form of monadology, in which monads were capable of essential interaction, unlike Leibniz's theory of pre-established harmony.