The Unknown History of the 20th Century, Part 2: 1926-1975: The Great Reversal
The triumph of statist humanism in public education escalated after Bryan's cultural defeat and death in July 1925.
The Darwinists did not get their position on biological evolution into high school textbooks until after 1960. They had to content themselves with promoting humanistic nationalism.
So, there was a standoff in biology courses for four decades. But the humanists' myth of religious neutrality in tax-funded education became almost universally accepted by Protestants. This led to the disappearance of fundamentalists as a national voting bloc. There would be no repeat of the Prohibition amendment in American politics. It was repealed in 1933. So were the fundamentalists. The reversal did not end until the mid-1970's.
In between, a religious transformation re-shaped what had been a Protestant culture. It was like the wilderness wandering of the Hebrews after the Exodus. This lecture discusses that transformation.