Ceremonial deism

Ceremonial deism is a legal term used in the United States for nominally religious statements and practices deemed to be merely ritual and non-religious through long customary usage. Proposed examples of ceremonial deism include the reference to God introduced into the Pledge of Allegiance in 1954, the phrase "In God We Trust" on U.S. currency, and the Ohio state motto, "With God, all things are possible".

The term was coined in 1962 by the then-dean of Yale Law School, Eugene Rostow, and has been used since 1984 by the Supreme Court of the United States to assess exemptions from the Establishment Clause of the First Amendment to the U.S. Constitution.

The first use of the term in a Supreme Court opinion is in Justice Brennan's dissenting opinion in Lynch v. Donnelly, 465 U.S. 668 (1984).

...I would suggest that such practices as the designation of "In God We Trust" as our national motto, or the references to God contained in the Pledge of Allegiance to the flag can best be understood, in Dean Rostow's apt phrase, as a form a "ceremonial deism," protected from Establishment Clause scrutiny chiefly because they have lost through rote repetition any significant religious content.

In Elk Grove Unified School District v. Newdow, 542 U.S. 1 (2004). Justice O'Connor, concurring in the opinion, invoked the term in her analysis of the nature of the phrase "under God" in the Pledge of Allegiance, saying in part

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