Social ontologists commonly think that our ideas about social entities, and about other people also inhabiting the social realm, play an important role in making those entities into what they are. At the same time, we know that our ideas are often indeterminate in character, which presumably would mean that this indeterminacy should carry over to the social realm. And yet social indeterminacy is a neglected topic in social ontology. It is argued that this neglect can be traced to how (...) a particular approach that favors ahistorical reconstructions in making sense of social entities has come to dominate social ontology. If we think beyond the parameters set by this approach, however, we can see that recognizing indeterminacy as a pervasive phenomenon in the social realm might open up new interpretative possibilities in relation to different social categories. This argument is at least partly in line with recent calls for a move towards nonideal social ontology. (shrink)