The Architectonic of Pure Reason, one of the most important sections of Kant's first Critique, raises three fundamental questions. What can I know? What should I do? What may I hope? Taken together these questions converge on a fourth one, which is at the centre of philosophy as a what is the human being? Lea Ypi suggests that the answer to this question is tied to a particular account of the unity of reason - one that stresses its purposive character. By focusing on the sources, evolution and function of Kant's concept of purposiveness, this book shows that the idea of purposiveness that Kant endorses in the Critique of Pure Reason is a concept of purposiveness as intelligent design, quite different from the concept of purposiveness as normativity that will become central to his later works. In the case of purposiveness as design, the relationship between reason and nature is anchored to the idea of God. In the case of purposiveness as normativity, it is anchored to the concept of reflexive judgment, and grounded on transcendental freedom. Understanding this shift has important implications for some of the most difficult questions that confront the Kantian the passage from the system of nature to that of freedom, the relation between faith and knowledge, the philosophical defence of progress in history, and the role of religion. It is also crucial to shed light on the way in which Kant's critique has shaped the successive German philosophical tradition.
Lea Ypi is professor of political theory at London School of Economics, and adjunct associate professor of philosophy at the Australian National University, with expertise in Marxism and critical theory. A native of Albania, she has degrees in philosophy and in literature from the University of Rome La Sapienza, a Ph.D. from the European University Institute and was a post-doctoral prize research fellow at Nuffield College, Oxford University. Her latest book, a philosophical memoir entitled “Free: Coming of Age at the End of History,” published by Penguin Press in the UK and W. W. Norton & Company in North America, won the 2022 Royal Society of Literature Ondaatje Prize and the Slightly Foxed First Biography Prize. She lives and works in London.