Do you think it is possible to make a libertarian society that is based entirely on libertarian principles on Earth?
Libertarianism is it's own spectrum. I just think that you can never enforce a single populist regulation, but continuously repeal libertarian ones.
I would say so, although there are various contrasting libertarian positions and principles. I'd say it's more of a case of whether or not they would be desirable
The Founders came pretty close.
The country outlined by the founding fathers is not libertarian, neither in theory nor in practice. All libertarians reject slavery and most would be skeptical of the elitism of most of them. I can't think of any Founding Father, except maybe Thomas Paine, whose ideas don't conflict with every form of libertarianism.