Maximiliana Jewett Rifkin

What is it for an animal to be female, or male? An emerging consensus among philosophers of biology is that sex is grounded in some manner or another on anisogamy, that is, the ability to produce either large gametes (egg) or small gametes (sperm), though the exact nature of this grounding remains contentious. Here we argue for a new conception of this relation. In our view, one’s sex doesn’t depend on the kind of gamete one is capable of making, but on the kind of gamete one is designed to make, where design is understood in terms of an evolutionary or ontogenetic selection process. Specifically, we argue that what it is to be, say, male, is to have a part or process that has the (proximal or distal) biological function of producing sperm. We outline and defend our view, and sketch some implications for scientific and social problems related to sex.

Here, I first analyze gender identity qua gender self-ascription and offer a theory of the psychological states underpinning gender self-ascriptions, which I call a form of ‘self-identification’. I hold gender self-identification consists of a gender self-concept, which itself consists of a belief or assumption in a context, and sometimes involves a gender role ideal, which consists of an individual’s expectations and standards for how to perform a gender role. Second, I defend my view from an objection to similar views like it, which amounts to the claim that they cannot explain nonbinary gender identities, by showing how my account explains various nonbinary gender identities in psychological terms. Finally, I show how my view can begin stabilizing the construct of gender identity in neuroscience by helping researchers foster agreement on how to define gender identity and what methods are best to study it.