Many libertarians in the United States seem to believe that effective communication is the missing piece of the revolution they seek in American politics. The notion, I think, is that the libertarian definition of freedom holds an inherently wide appeal, and if more people heard their message, libertarians would sweep into office across the land. That this fantasy endures speaks to the epistemic closure that pervades fringe movements.
Libertarianism is inherently an opposition ideology. In terms of practical politics, that means opposition to social insurance, opposition to military intervention, and opposition to monetary policy, chiefly. The first obstacle to the libertarian revolution is that these broad policy categories are all fairly popular. When any specific provision of, say, social insurance actually approaches the chopping block, as Medicare did
recently, opposition to the cut in question overwhelms opposition to the program.
The second obstacle, as identified by
Nate Cohn, is that self-identified libertarians often do not vote, and when they do, they do not reliably vote for self-identified libertarian politicians. Mr Cohn theorizes that "'libertarianism' has become a catchall phrase for iconoclasts of all political stripes." Therefore, the target audience of self-identified libertarian politicians (nominal Republicans, in every case) is a subset of the approximately 11% of the population that identifies as libertarian, namely the fraction that can be counted upon to vote Republican.
An implied third obstacle is that any politician that chooses that thorny path is placing a wager that the total volume of voters that their libertarian message attracts is greater than the total volume that it repels. A tall order indeed.
Update: Professor Mankiw
weighs in, but manages to refer to Ron Paul when he clearly intends to refer to Rand Paul. Professor Freud has no comment.