With these words, John Finnis, while still in his late 30s, began his masterwork, Natural Law and Natural Rights—the book that would not only revive scholarly interest in the venerable, but deeply misunderstood, idea of natural law and natural rights, but also powerfully challenge dominant ways of thinking among philosophers of law and moral and political philosophers in the analytic tradition.1 Future intellectual historians will no doubt present the book, together with Professor Finnis’s other philosophical writings, as part of the broad revival in more or less Aristotelian approaches to moral and political thinking that gained prominence beginning in the late 1970s. And they will be right to do so. Like Elizabeth Anscombe, David Wiggins, Philippa Foot, Alasdair MacIntyre, and many others, Finnis adopted or adapted Aristotelian methods to overcome the defects of utilitarian and other consequentialist approaches to ethics, on the one side, and Kantian or purely “deontological” approaches, on the other.