Abstract
This article addresses the Kantian background to Nietzsche's metaphysics. Focusing on the issues of causality and force, I argue that Nietzsche's will to power thesis emerges in response to Kant's approach to the question of causality. I contend that Nietzsche sides with Kant, contrary to Schopenhauer, in his identification of force with efficient causality, indicating his approval of Kant's restriction of the objective applicability of the concept of causality to the phenomenal sphere. However, Nietzsche contends that Kant fails to fully execute his project due to his retention of the thing-in-itself as the realm in which the inner determinations of things reside. I argue that Nietzsche makes it his task to complete the Kantian project by reconciling force with its disinherited inner determinations at the level of phenomena rather than things-in-themselves.