The maxim dates at least to 1837, when a judge, ruling in favor of a parent against the maintenance of her children, said, "We have heard that hard cases make bad law." The judge's wording suggests that the phrase was not new then.
Oliver Wendell Holmes Jr. made a
utilitarian argument for this in his judgment of
Northern Securities Co. v. United States (1904): Holmes's dissenting opinion in the case, which applied the
Sherman Antitrust Act to the securities company, has been described as a reaction to President
Theodore Roosevelt's wish to dramatize the issues of monopolies and trusts. The legal scholar
Glanville Williams questioned the adage's usage in 1957, writing, "It used to be said that 'hard cases make bad law'—a proposition that our less pedantic age regards as doubtful. What is certain is that cases in which the moral indignation of the judge is aroused frequently make bad law."
Bryan A. Garner calls the phrase a cliche; while mentioning Williams's disparagement, he asserts that it remains in frequent use, "sometimes unmeaningfully". ==Bad law makes hard cases==