How did Immanuel Kant influence German idealism and later philosophy?

Immanuel Kant profoundly shaped German idealism and the subsequent trajectory of Western philosophy by initiating a "Copernican revolution" in thought. He argued that objects must conform to the human apparatus of knowing, rather than human knowledge conforming to objects. By identifying the mind's active role in structuring experience through a priori forms—such as space, time, and the categories of understanding—he bridged the gap between rationalism and empiricism.1234

His influence on German idealism was direct, as his successors sought to resolve perceived ambiguities in his work, particularly regarding the thing-in-itself. Thinkers like Johann G. Fichte, F.W.J. von Schelling, and Hegel rejected the existence of the unknowable thing-in-itself, instead developing systems where the Ego or "absolute Spirit" became the foundational source of reality.4

Beyond idealism, Kant’s critical method and his focus on the limits of reason established a new definition of philosophy that continues to inform Kantianism and contemporary debates in epistemology, ethics, and aesthetics.523