German Idealism was one of philosophy's most audacious attempts to explain how reason, freedom, nature, morality, history, and reality could belong to a single intelligible world. It began with Kant's effort to establish the limits of human knowledge and ended with Hegel constructing a system in which even those limits had acquired a history. German Idealism from Kant to Hegel follows the argument from the intellectual crises that made Idealism possible through Kant, Fichte, Schelling, and Hegel, while also examining figures such as Spinoza, Rousseau, Jacobi, Reinhold, Schulze, Maimon, Hölderlin, and the early Romantics. The book explains the central ideas behind transcendental idealism, autonomy, the thing-in-itself, self-consciousness, recognition, the Absolute, Naturphilosophie, dialectic, alienation, Spirit, social freedom, and the philosophy of history. Along the way, it shows why each new system arose from problems left by the previous one. Kant drew boundaries around reason; Fichte decided some of them were unnecessary; Schelling objected that nature had been reduced to scenery; Hegel concluded that the real problem was treating the boundaries as fixed in the first place. The story does not end with Hegel. The book follows German Idealism into Feuerbach, Marx, Kierkegaard, Schopenhauer, Nietzsche, phenomenology, existentialism, Marxism, Critical Theory, hermeneutics, and contemporary theories of recognition and social freedom. It also confronts the tradition's persistent difficulties: the ambitions of speculative reason, the danger of turning contingent history into necessary progress, Hegel's Eurocentrism, the political risks of reconciliation, and the uncomfortable possibility that the Absolute may preserve individuality mainly by explaining why it was never as independent as it thought. This is the story of how a generation of thinkers tried to reconcile freedom with necessity, thought with reality, and the individual with history-and, having found those tasks insufficiently difficult, attempted to explain why all three conflicts belonged to one system.