CSPAN2 showed an interview of Brian Doherty, author of
Radicals for Capitalism: A Freewheeling History of the Modern American Libertarian Movement. If you missed it, enjoy!
http://www.booktv.org/ram/afterwords/0207/arc_btv021007_4.ramI really liked how he tied in libertarian ideals with being most in line with the Constitution and DoI, and really being the foundation for "American Ideals" as we know them.