The ideas of Babbitt, More, and Santayana had small circles of following but didn’t capture the general public’s attention. The nation greatly changed in character and temperance from WW1 to WW2 and conservatism was adrift.
George Santayana had a rich depth of conservative ideas that identified and fought against the materialism of the modern world.
Paul Elmer More is thought of "as a critic of ideas, perhaps there has not been his peer in England or American since Coleridge". He fought the pragmatism of James, the naturalism of Dewey, the sentimentality of the socialists, and the presumption of those that forgot dualism.
Irving Babbitt saw that man was reduced from a state of the exercise of the Will (bound by Rule of Law) to a “gross materialism” and a “single sensate level”. Man destroys himself if he stifles the power of the Will for the anarchy of beasts (Rule of Senses). In him American conservatism reaches maturity.
Conservatism was in a sort of "wilderness" and struggled through the beginning years of the 20th century. Great leaders of ideas were hard to come by, and it seemed that the vision of America espoused by Hamilton had won. Ideas shifted from the political leaders to the educational leaders.