The Libertarian Party was born in 1971. Like the Green Party, it has philosophical roots that extend far back into history. It emerged, however, at a time when conservatism was in decline. Just as Greens attract liberals today and are strongly influenced by the liberal agenda, Libertarians attracted conservatives and were influenced by their agenda. However, as Libertarians are more analytically rigorous, there are fewer blatant inconsistencies between their positions and their principles.
Libertarian bias tends to show up more in prioritization of issues than in any particular issue.
For example, Libertarians are far more prone to complain about the capital gains tax than about many other taxes, even though there is nothing uniquely un-libertarian about that particular tax. Many Libertarians ignore classic libertarian writings and dwell on the works of Ayn Rand, Murray Rothbard and Ludwig von Mises. The classical libertarians get mere superficial attention. For example, few have read Tragedy of the Commons, but many quote the title. Specifically, they are unwilling to recognize that the ecological mishaps like those referred to in that work had been absent for centuries when almost all land was common.