And this is a great example of why I think we’re diverging even as we state many similar principles. If concentrated power is the enemy, not the abrogation of rights, then there’s a lot that happens at the local, familial, and small group level that falls outside of the strict boundaries of libertarian concerns. So it’s natural that a “thick” libertarian would not approve of that kind of libertarianism.

I need to read the essay on thick and thin libertarianism again to make sure that I’m using those terms correctly; feel free to correct me or clarify muddy thinking.

Well, thin libertarianism is the position that “libertarian concerns” should be narrowly construed, as being exhausted by whatever your favorite specification of the non-aggression principle is (abrogation of individual rights, violations of equal liberty, initiation of force, whatever). Thick libertarianism is the position that “libertarian concerns” should be construed more broadly, as including a definite stance for or against at least some attitudes, practices, traditions, practices, projects, institutions, etc. that are logically consistent with, but not entailed by, the non-aggression principle. (All the forms I’ve discussed in my writing on the topic, at least, are forms of “thickness” in which the cause for concern is that the commitments that go beyond the logical entailments of a commitment to non-aggression are still linked to a commitment to non-aggression in some other, weaker, but still interesting sense — e.g. causally linked, or in application to specific cases, or in virtue of being two different conclusions of a common set of prior premises.)

Strictly speaking, if a “thin” libertarian is being consistent about the non-aggression principle, then she will still concern herself with things that happen outside the scope of the State insofar as they involve the direct use of violence — so, for example, her version of “libertarian concerns” would still properly include non-State forms of systemic coercion like race slavery or violence against women. A “thick” libertarian would agree, but take it one step further to include things other than the express acts of violence, which she takes to be importantly connected with the express acts of violence (e.g. white supremacist prejudices, patriarchal rape culture, etc.).

I don’t think the distinction lines up neatly with the question of whether the libertarian or anarchist in question focuses narrowly on anti-statism or generalizes to cases other than the State. (Cf. 1. Some “thin” libertarians do tend to write as if the State were the only significant form of systemic coercion, and “thick” libertarians may be more likely to recognize the existence of other forms of systemic coercion, but in principle a “thin” libertarian might very well recognize other forms, while a “thick” libertarian might in principle regard statism as the only significant form of systemic coercion around, and devote her time spent on “thick” concerns entirely to the stuff that she takes to be causally or conceptually supporting statism.)

So thick libertarians will probably tend to be much more interested in things like a critique of institutionalizing or otherwise concentrating social power, even without that critique cashing out at some point in references to rights-violations. Thin libertarians will tend to argue that those concerns are either uninteresting, or, if interesting, still outside the scope of libertarianism per se.

I’m not sure how far this clarifies the point that you were interested in clarifying.

… I think numbers *do* constitute authority …

Authority for what?

Do you mean to suggest that, for example, that superior numbers gave Anytus’s party the rightful authority to kill Socrates, or the Roman occupiers the rightful authority to crucify Jesus?

If so, why? If not, then what do their superior numbers give them the rightful authority to do?