<div>When this work was first published in 1960, it immediately filled a void in Kantian scholarship. It was the first study entirely devoted to Kant's <i>Critique of Practical Reason</i> and by far the most substantial commentary on it ever written. This landmark in Western philosophical literature remains an indispensable aid to a complete understanding of Kant's philosophy for students and scholars alike.<br><br>This <i>Critique</i> is the only writing in which Kant weaves his thoughts on practical reason into a unified argument. Lewis White Beck offers a classic examination of this argument and expertly places it in the context of Kant's philosophy and of the moral philosophy of the eighteenth century.<br><br></div>