However, being a genuine religious fanatic (thank you ladies and gentlemen, thank you!) I don't go by the denotation of the word but its connotation. I came out of an apocalyptic chr*stian Fundamentalist worldview that wasn't interested in "conserving western civilization" in the least (since Satan was the ruler of this evil world and it could never be made less than totally depraved) but in its overthrow by the eschatological Kingdom of G-d on earth (which "palaeos" and atheists insist is the true origin of Marxism anyway).
Now while I know longer subscribe to my original theological worldview I continue to maintain that the True G-d deserves and demands the acknowledgement of every being, regardless of "culture" or "civilization," so these things are ultimately unimportant. It is the duty of every human being to cut through whatever "culture" he was born with to connect with the One Objective Unmediated and Unincarnate G-d of Israel.
The "palaeos" and atheists can have "western civilization." Give me the Rebuilt Holy Temple!
Libertarianism was (and is) dominated by atheists, agnostics, and deists. The one exception that I am aware of is Edmund Opitz, and I believe he was a theologically liberal Congregationalist. Some Reconstructionists, such as Gary "Y2K" North, have claimed affiliation with libertarianism, but while they are free market advocates and supporters of minimal government, their goal is ultimately to restore Old Testament civil law (with Reconstructionists substituting for Jews). This position would conflict with either the Randian or logical positivist viewpoints that deny anything like divine sources for law, much less the existence of the supernatural. In recent years, there has been a number of Catholic libertarians, many of whom write for LewRockwell.com and even a Calvinist or two, notably Representative Ron Paul.
The conspiratorialist/"blood and soil" Right was also rather short of evangelicals or fundamentalists in their leadership. Robert Welch was a Unitarian, and Willis Carto is probably some sort of neo-pagan. Sam Francis and Revilo Oliver, intellectual leaders in this camp, were atheists. A majority of the rank and file of the John Birch Society were Catholic or Mormon, although they probably had a large number of evangelicals and fundamentalists in their 1960s strongholds of Southern California and Texas. There were, of course, pseudo-fundmentalists, such as the Christian Identity or Anglo-Israelite followers, who belonged to the conspiratorialist wing.
The rise of the Christian Right in the 1970s was largely motivated by the cultural decay that were exemplified in the sexual revolution, increased crime, the so-called counterculture, and so forth. The leaders of the post-1975 Christian Right had previously been either apolitical (Jerry Falwell, Tim LaHaye, D. James Kennedy, James Dobson) or even liberal Democrats like Pat Robertson, who had worked for Adlai Stevenson's presidential campaign. With the exception of Dobson, most of these leaders are premillenial in eschatology and many, including Falwell and LaHaye, believe in the pre-tribulation Rapture of believers.
There is an inherent contradiction between believing that "the earth is not my home" and turning the local Southern Baptist, Nazarene, Bible, PCA, or Assemblies of God church into a center of political activism. If you read biographies of the leaders of the Christian Right, it becomes apparent that they were reacting to the cultural revolution of the secular Left.
Most of the Christian Right's leadership is now in their 70s, and, for that matter, most of the prominent ministries, even apolitical ones like those of Chuck Swindoll, R.C. Sproul, and Charles Stanley, are led by men eligible for Social Security. There will be a generational shift in the evangelical and fundamentalist world in the next five to ten years. What will be interesting will be what direction the new leadership will take those people who are the largest segment of the American population.