You use the term, "modern," to distinguish one version of libertarianism from...what? Is there an antediluvian libertarianism? Is there aTo which I replied
non-Hobbesean [sic] libertarianism that advocates positive rights?...
I don't mean to nit-pick; I just don't understand the point you're making.
Libertarianism as we know it today (i.e., "modern" libertarianism) is the cumulative product of centuries of thought. It didn't fall out of the sky as "libertarianism." Yet, Mill, for example, was more or less a libertarian, even though he didn't use that term. So, I'm using the term "modern" to distinguish the "mature" modern version of libertarianism from its less developed antecedents, which went by other names. That's all. Nothing deeper.