Book excerpt: "Social ontology, conventionally defined, is not primarily about us. Rather, it is about the social world (or worlds), about social reality (or realities), or about the domain(s) of social facts. Social ontology aims at providing an inventory of the basic kinds of entities that make up the social world(s) - items such as norms, institutions, social practices, status positions, power structures, and artifacts. It is the study of the basic kinds of properties of these entities, and of how the social world exists, how it is constituted, or constructed"--