Abstract: Can we regard ourselves as free originators of some of our behavior? What is the place of values in a world of facts? What grounds the authority of moral imperatives, and why should we care about them? Unless satisfactory answers are provided for these questions, ethics has no credible status and is likely to be swallowed by psychology, history, or rational decision theory: an outcome quite common in recent (post-Hegelian) times as well as one to be strongly regretted. Immanuel Kant's philosophy is a sustained, bold, and successful effort aiming at offering us the answers we need, and this book is a clear and thorough account of this effort that builds on the author's previous interpretation of transcendental philosophy (as articulated in his Kant'sCopernican Revolution) and draws on the entire Kantian corpus. Free choice is rational choice, hence, it is also what reason would consider a good choice; evil behavior is not free — when we behave irrationally, we lose all control on our conduct and become obtuse wheels in the hands of irresistible nature. Which does not mean, however, that we should not take responsibility for our evil actions. On the contrary, that is exactly the right thing to do, despite the absurdity of the stance it involves. This very absurdity teaches us an important Kantian lesson on how to negotiate the bounds of sense: how there is not a single line demarcating sense from nonsense, but rather a variety of shades of (non)sense, experienced in the wake of an ideal of perfect meaningfulness but forever falling short of that ideal. In pursuing this troubling suggestion, the author brings additional light on Kant's understanding of the human form of life. Specifically, on its irremediably conflictual, undecidable character, and on the primacy unrealizable norms have in it.

Keywords: freedom, values, imperatives, rationality, nature, responsibility, choice, sense