The U.S. Founding Fathers were not Conservative. They were radical 18th century Liberals. In fact, modern American “Conservatism” is actually Liberalism, whereas modern American “Liberalism” is actually Socialism. True Conservatism (European Conservatism) is loyalty to the old order of Europe: Monarchy, Aristocracy, Papacy. Regarding Libertarianism, that is a form of Anarchism. In other words, Libertarianism is as far to the left as you can get without being a full blown Anarchist. It is further to the left than Communism.