Are the Republican Party a Pan-Slavic party? Some parties and ideologies don't make sense outside of the cultural context they was born in, and American Libertarianism are one of those parties. They would in an international context just be described as a Neo-Liberal or Anarcho Capitalist party (the latter description are more of the description of the ideology some of its members hold, than their official ideology). So it doesn't make sense to talk about an Libertarian Party outside USA (unless it's European anarchist we're talking about) or in an context where people have been so assimilated into an American political context that they're unelectable abroad.
I agree. The Libertarian Party arose largely in response to dissatisfaction with the direction the Republican Party was taking as it consolidated its Social Conservative, Defense Hawk and Pro-Business blocs and integrated the conservative wing of the Democratic Party into the coalition.
The insistence on keeping religious-influenced social conservatism and economic "liberalism" (non-US term) joined at the hip is a distinctly American phenomenon. Maybe it's because the European Right had the additional mission of preserving the old aristocratic order, while America had no Old Order to preserve apart from a very Middle Class White preconceived notion (not especially historically accurate) of what "Traditional America" was like and how best to preserve it.
The Libertarian Party was not dissatisfied with the GOP because they became socially conservative. They were dissatisfied because their right-wing economics weren't right-wing enough. The early Libertarian Party focused almost entirely on economics. Their social liberalism was basically limited to the fact that they didn't care one way or the other.
You really think so? The original 1972 LP platform included support for legalization of all drugs, repeal of all anti-suicide, anti-sodomy, anti-pornography etc. laws, and ending the surveillance state. That doesn't really sound like apathetic social liberalism.