What're you basing that little nugget on?
Let's review.
Libertarianism as we know it only dates back to the 1930's, and guys like A. Jay Nock, Ayn Rand, Isabel Paterson, and so forth (although you can find its intellectual roots in earlier movements, it's really not fair to claim "the Founding Fathers were libertarians"). It only really gets "formed" as a movement in the 1970's, and its really very, very small.
So the libertarian movement advances its goals by several means:
1. Separating the "libertarian agenda" into separate ideas and marketing them to a larger movement. School vouchers are an awesome example of this, and the larger separation of school and state agenda.
2. Marketing efforts on the intellectual/academic level. Libertarianism is now at about the stage socialism was in the late 19th century, where it was mostly the province of intellectuals and exciteable 16-year-olds, and it promoted itself from there. This is where anarchists like Rothbard excel - because to recruit academics it's entirely unnecessary to discuss politically achievable goals. That's not what this game is about at all.
3. Political activism. This is arguably the least effective front at the moment, but libertarians do excel in those venues which reward activism and dedication more than they reward sheer numbers - for example, the courts. It is libertarian attorneys and Free State Project members that gave you Heller.