Jefferson's admonition that government is best when it governs least. Libertarians would revive that principle. To tell you the truth, I'm probably more of a Libertarian than anything, because my philosophy is basically leave me the hell alone. Libertarians seek to preserve individual freedom, much like Democrats, and they oppose government intrusion, much like Republicans. Nationally, the Libertarian Party is the most successful and coherent third party in the United States.
Republicans think government knows best how folks ought to conduct their ppersonal lives.
Libertarians, with influence beyond their numbers, will have none of that. Moving the political debate their way would benefit the nation.