Abstract
This paper analyzes and discusses the principle of Succession, formulated by Kant in 1755s Nova Dilucidatio. The principle, as we will see, shows that the kind of causally isolated substances invoked in pre-established harmony are incapable of undergoing change. After first analyzing Kant’s specific arguments in order to prove his principle, I shall argue that the Kantian critique against the leibnizians refers to the general bias consisting in putting on a level the logical and real realms, and consequently to confuse the concepts of logical ground and real cause.