 Witt’s gender essentialist argument crucially pertains to social individuals, not to persons or human beings: saying that persons or human beings are gendered would be a category mistake. But why is gender essential to social individuals? For Witt, social individuals are those who occupy positions in social reality. Further, “social positions have norms or social roles associated with them; a social role is what an individual who occupies a given social position is responsive to and evaluable under” (Witt 2011a, 59). However, qua social individuals, we occupy multiple social positions at once and over time: we can be women, mothers, immigrants, sisters, academics, wives, community organisers and team-sport coaches synchronically and diachronically. Now, the issue for Witt is what unifies these positions so that a social individual is constituted. After all, a bundle of social position occupancies does not make for an individual (just as a bundle of properties like being white, cube-shaped and sweet do not make for a sugar cube). For Witt, this unifying role is undertaken by gender (being a woman or a man): it is