Ghostwriters for the Courts: The Climate Litigation Network Behind a Withdrawn Judicial Manual
6th March 2026
Late last year the federal judiciary quietly released a document that almost nobody outside legal circles normally notices: the fourth edition of the Reference Manual on Scientific Evidence. Within weeks one section of that manual vanished.
The reason it vanished reveals something deeply troubling about how climate science, academic institutions, and high-stakes litigation have become entangled.
The manual itself is not obscure inside the legal system. Since the early 1990s it has served as the judiciary’s technical guidebook for evaluating scientific claims presented in court. The need for such a guide arose after the Supreme Court’s 1993 decision in Daubert v. Merrell Dow Pharmaceuticals, which placed judges in the position of evaluating whether expert testimony is scientifically reliable before allowing it to reach a jury.
Judges are not physicists or epidemiologists. They are generalists. The manual exists to translate complex scientific disciplines into language courts can use.
Because of that role, the document carries extraordinary weight. Judges cite it. Lawyers study it. It is produced jointly by the Federal Judicial Center—the research arm of the federal courts—and the National Academies of Sciences.
Neutrality is supposed to be its defining feature.
The fourth edition, released on December 31, 2025, contained a new element: a chapter devoted entirely to climate science. That chapter ran roughly ninety pages and attempted to explain the fundamentals of climate research and the emerging field of climate attribution.
Within weeks it became the center of a political and legal storm.
In January 2026 a coalition of 23 state attorneys general sent a letter to the judiciary raising concerns that the chapter presented contested scientific issues as settled fact. Members of Congress soon followed with similar objections.
The concern was not abstract.