I will try to respond with as much academic clarity as possible, to avoid any misunderstanding of exactly what I mean when I talk about uncontained libertarianism:
Libertarianism, while a vital force for individual freedom and resistance against tyranny, can become self-defeating and enable fascism when taken to an extreme and not constrained by a commitment to the common good. The libertarian focus on individual liberty and skepticism of collective action, when unmoored from any conception of public interest or social responsibility, can erode the very foundations of a free and open society.
By making epistemic arguments against the possibility or knowability of the common good, radical libertarianism can fuel a market fundamentalism that concentrates power in the hands of the wealthy, dismantles social protections, and undermines the capacity for democratic self-governance. This atomistic individualism creates a vacuum of meaning and solidarity that is easily exploited by fascist demagogues promising a return to unity and purpose through authoritarianism. Thus, an improperly contained libertarianism that rejects any notion of the public good or legitimate government can paradoxically enable a far greater threat to human freedom in the form of fascist tyranny. The libertarian impulse must be balanced with a commitment to the rule of law, democratic institutions, and some conception of our shared responsibilities and interests as a society.