According to Mises, society is a whole that is no greater than the sum of its parts:
The total complex of the mutual relations created by such concerted actions is called society…. But society is nothing but the combination of individuals for cooperative effort. It exists nowhere else than in the actions of individual men. It is a delusion to search for it outside the actions of individuals. To speak of a society’s autonomous and independent existence, of its life, its soul, and its actions is a metaphor which can easily lead to crass errors. (Human Action, 143)
A couple of responses. The first is that Mises seems to posit a false dichotomy between society being nothing more than the aggregation of “individuals for cooperative effort” on the one hand, and, on the other, the supposed alternative of society somehow existing elsewhere “than in the actions of individual men.” (I.e., I submit that there is no contradiction for society to be, contra Mises, more than the combination of individuals for cooperative effort, while at the same time, and consistent with Mises, “exist[ing] nowhere else than in the actions of individual men.”)
Second, is it not rather arbitrary for Mises so willingly to accept mind, reason and their correlate, human action, as “ultimate” givens that are irreducible to the mere material processes of nature (Mises’s “methodological dualism”), while insisting that society, by contrast, is nothing more than and is therefore reducible to the individuals of which it is composed? Mises is an unapologetic dualist in the one case and an incorrigible reductionist in the other. But sauce for the goose is sauce for the gander, I say. Human sociality is every bit an irreducible “given” as human rationality.