to my mind much of the confusion here is the use of "beliefs" and "ideology" to describe libertarians. I'm libertarianish, but I don't view it as a set of beliefs, doctrines or ideologies at all. There's nothing to be a heretic or apostate from, and no single set of rules. I view it mainly as a series of preferences and inclinations, any of which in a particular case might give way in the face of other considerations. Or, as I have said in other contexts in this community, I'm a libertarian, not an anarchist. It might be more accurate to call me a classical liberal than a libertarian, but the label isn't all that important. It's also important to be realistic about things, which is why I say I have preferences and inclinations rather than beliefs and doctrines: theoretical purity is pretty useless as applied to everyday life. We don't live in a world of limited government, so I'm not going to pretend that we do. And I'm not going to pretend that there aren't people in society who need help (though we can argue about how to define that).
Also, I question how much libertarian philosophy has rationally to say about foreign policy, because libertarianism presupposes rule of law and various other forms of cultural infrastructure, institutions and civil society that simply doesn't exist in the international sphere.
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