Gustave de Molinari (1819-1912) starts with the observations of his mentor, and the laissez faire school in general, about society. These same observations about "natural society" have been made by virtually all anarchists, and indeed virtually all classical liberals.

Man experiences a multitude of needs, on whose satisfaction his happiness depends, and whose non-satisfaction entails suffering. Alone and isolated, he could only provide in an incomplete, insufficient manner for these incessant needs. The instinct of sociability brings him together with similar persons, and drives him into communication with them. Therefore, impelled by the self-interest of the individuals thus brought together, a certain division of labor is established, necessarily followed by exchanges. In brief, we see an organization emerge, by means of which man can more completely satisfy his needs than he could living in isolation.

This natural organization is called society. - Gustave de Molinari, The Production of Security

He goes on to state the "well-established truth in political economy," that monopolies are not in the interest of consumers. Thus he reached the radical conclusion that shook his fellow economists: "That no government should have the right to prevent another government from going into competition with it, or to require consumers of security to come exclusively to it for this commodity."

In the remainder of his paper, Molinari goes on to argue that government is no exception to the well-established natural law regarding monopoly. Furthermore, the only alternatives to competition among security services are monopoly and [statist] communism, i.e. common ownership. But this latter amounts to a disguised form of monopoly.