Phenomenology, together with Marxism, pragmatism, and analytic philosophy, dominated philosophy in the twentieth century—and Edmund Husserl is usually thought to have been the first to develop the concept. His views influenced a variety of important later thinkers, such as Heidegger and Merleau-Ponty, who eventually turned phenomenology away from questions of knowledge. This book, which argues for a return to phenomenology's origins in epistemology, does so by locating its roots in the work of Immanuel Kant, tracing the formulation of Kant's phenomenological approach back to the second edition of his Critique of Pure Reason. In response to various criticisms of the first edition, Kant more forcefully put forth a constructivist theory of knowledge. This shift in his thinking challenged the representational approach to epistemology, and it is this turn, the book contends, that makes Kant the first great phenomenologist. The book then follows this phenomenological line through the work of Kant's idealist successors, Fichte and Hegel.