Since I found myself rereading this article,

What We Mean by Individualism, by Adam Martin, at the Mises Institute site, I thought I'd share the high points with you:

There are two senses in which Austro-libertarians consider themselves individualists: metaphysically and morally, with the latter being drawn from the former. A proper understanding of these senses immediately dispels the conservative objections to libertarian points.

Metaphysical individualism means that man is metaphysically prior to any social network, be it a subsidiary institution such as the family or a whole nation. That is, social phenomena have no existence apart from the actions of the individuals who participate in them. Subsidiary institutions are real, but they are real in a derivative sense: it is only because the individual man has a social nature that the institutions have being at all.

This point is often confused for a historical one, especially in economic and political theorizing. It is an obvious myth that man's "original condition" is isolation; the mere fact of his biological reproduction is enough to dispel this fantasy.4 The economic story of Robinson Crusoe, however, is not a story about historically isolated man, but rather one about metaphysically distinct man, who, because he has free will, must take the center stage in any social theorizing. This is the root cause of the Austrian adherence to methodological individualism, which recognizes man's action as the cause of social institutions and thus relates all social phenomena back to the necessary formal structure of the choices of individuals.

Yep.