In this context, A.P.D. Entreves critiques the Historical School by noting that while it
began by emphasizing the growth and organic development of law, it ultimately
became preoccupied with the scientific and academic study of legal systems, rather
than their practical development. Cardozo rejects such a narrow, backward-looking
focus. Instead, he insists that a judge’s responsibility must go beyond mere historical
explanation; it should actively engage with the living realities of the present and
anticipate the needs of the future.
Nevertheless, Cardozo concedes that historical context cannot be ignored altogether.
The development of positive law, i.e., law that is formally enacted or adopted by
competent authorities, is embedded in history. To interpret positive law outside of its
historical roots would render it meaningless or detached from its social foundations.
For instance, legal concepts such as feudal tenures or early forms of contract can
only be properly understood through their historical development.
2. The Method of Tradition or Custom
The second method Cardozo discusses is the method of custom or tradition, which
examines how long-standing practices and social behaviors influence legal
development. In earlier English jurisprudence, this method sparked significant
debate. On one hand, Sir Edward Coke viewed common law as distinct from
customs, whereas Sir William Blackstone argued that custom permeates and shapes
all areas of law. Cardozo adopts a more balanced position, acknowledging the role
of custom but rejecting both extreme viewpoints.
For Cardozo, the importance of custom lies not in the creation of entirely new legal
rules, but rather in providing standards and tests that guide the application of
already established principles. In this sense, custom operates more as a lens
through which legal norms are interpreted and less as a generator of law in itself. The
creative power of custom is subtle—it does not invent the law, but it informs its
practical implementation.
He emphasizes that custom can influence law only when it gains recognition through
legislation or judicial acknowledgment. However, custom's impact goes beyond
formal structures. As customs evolve and reflect the prevailing values of society,
they often merge with the broader moral consciousness of the time, shaping what
Cardozo calls the “customary morality”—the socially accepted norms and
principles of right conduct.