The idea that a common Judeo-Christian ethics or Judeo-Christian values underpins American politics, law, and morals has been part of the "American civil religion" since the 1940s. In recent years, the phrase has been associated with political conservatives, but the concept—though not always the exact phrase—has frequently featured in the rhetoric of leaders across the political spectrum, including that of Franklin D Roosevelt and Lyndon B Johnson.
The current American use of "Judeo-Christian" — to refer to a value system common to Jews and Christians — first appeared in print in a book review by the English writer George Orwell in 1939, with the phrase "the Judaeo-Christian scheme of morals." Orwell's usage of the term followed at least a decade of efforts by Jewish and Christian leaders, through such groups as the National Conference of Christians and Jews (founded in 1927), to emphasize common ground. The term continued to gain currency in the 1940s. In part, it was a way of countering antisemitism with the idea that the foundation of morals and law in the United States was a shared one between Jews and Christians.
The first inaugural address of Franklin D Roosevelt (FDR), in 1933, the famous speech in which FDR declared that "the only thing we have to fear is fear itself", had numerous religious references, which was widely commented upon at the time. Although it did not use the term "Judeo-Christian", it has come to be seen by scholars as in tune with the emerging view of a Judeo-Christian tradition. Historian Mary Stuckey emphasizes "Roosevelt's use of the shared values grounded in the Judeo-Christian tradition" as a way to unify the American nation, and justify his own role as its chief policymaker.
In the speech, FDR attacked the bankers and promised a reform in an echo of the gospels: "The money changers have fled from their high seats in the temple of our civilization. We may now restore that temple to the ancient truths. The measure of the restoration lies in the extent to which we apply social values more noble than mere monetary profit." Houck and Nocasian, examining the flood of responses to the First Inaugural, and commenting on this passage, argue:
Gary Scott Smith stresses that Roosevelt believed his welfare programs were "wholly in accord with the social teachings of Christianity." He saw the achievement of social justice through government action as morally superior to the old laissez-fair approach. He proclaimed, "The thing we are seeking is justice," as guided by the precept of "Do unto your neighbor as you would be done by." Roosevelt saw the moral issue as religiosity versus anti-religion. According to Smith, "He pleaded with Protestants, Catholics, and Jews to transcend their sectarian creeds and 'unite in good works' whenever they could 'find common cause.'"