This book is not just about the ingredients that factor in a judge's decision. In the common law system, not only do judges have considerable latitude in interpreting the law, but they also have the power to fashion new rules. As such, this book also offers penetrating insight into the nature of law itself, and the society which constitutes the realm of its application.
Cardozo's breaks the judicial method down into four categories: 1) logic, symmetry, continuity with the past; 2) history, evolution, remembering the historical origins of a rule; 3) custom, tradition, trusting societal values and norms; 4) sociology, keeping in mind the ultimate goal of law: the welfare of society.
By distinguishing power and right, Cardozo carves out a middle ground between a formalist conception of law (which claims that all legal questions have a single answer found in the law) and a realist conception (which claims that law is simply whatever the judge says it is). In his view, it is true that judges have the power to decide legal questions however they'd like, even ignoring established legal principles, but they do not have the right to do so.
As Cardozo astutely points out, the ultimate source of the law is life itself. While on the surface, most cases are decided by reference to precedents, "back of precedents are the basic juridical conceptions which are the postulates of judicial reasoning, and farther back are the habits of life, the institutions of society, in which those conceptions had their origin, and which, by a process of interaction, they have modified in turn". And as obvious as that may seem, I appreciate his awareness that precedents and concepts are not the end-all-be-all, and that as a judge he is not in the business of arriving at objective truths about right and wrong. Indeed, Cardozo is frank about the fact that his is merely one perspective among many: "We may try to see things as objectively as we please. None the less, we can never see them with any eyes except our own."
He also discusses the philosophy implicit within the common law: "The common law does not work from pre-established truths of universal and inflexible validity to conclusions derived from them deductively." He quotes Munroe Smith: "The rules and principles of case law have never been treated as final truths, but as working hypotheses." This process of experimentation and modification is gradual, its effects measured by decades or even centuries. Cardozo even arrives at a kind of postmodern theory of truth: "Nothing is stable. Nothing absolute. All is fluid and changeable. There is an endless becoming."
"The future, gentlemen, is yours. We have been called to do our parts in an ageless process."