Feminist metaphysics

Feminist metaphysics aims to question how inquiries and answers in the field of metaphysics have supported sexism. Feminist metaphysics overlaps with fields such as the philosophy of mind and philosophy of self. Feminist metaphysicians such as Sally Haslanger, Ásta, and Judith Butler have sought to explain the nature of gender in the interest of advancing feminist goals.

Another aim of feminist metaphysics has been to provide a basis for feminist activism by explaining what unites women as a group. These accounts have historically centered on cisgender women, but philosophers such as Gayle Salamon, Talia Mae Bettcher and Robin Dembroff have sought to further explain the genders of transgender and non-binary people.

Social constructionism
Social constructionism emerged in feminism as a response to biological determinist claims of female inferiority. Existentialist philosopher Simone de Beauvoir argues in her seminal work The Second Sex that, although biological features distinguish men and women, these features neither cause nor justify the social conditions which disadvantage women. The distinction between sex and gender in feminist theory is commonly attributed to Beauvoir, although this reading has been contested.

Later theorists would challenge the commitment to the pre-social existence of sex, arguing that sex is socially constructed as well as gender. For Monique Wittig, the division of bodies into sexes is the product of a heterosexual society.

"There is but sex that is oppressed and sex that oppresses. It is oppression that creates sex and not the contrary. The contrary would be to say that sex creates oppression, or to say that the cause (origin) of oppression is to be found in sex itself, in a natural division of the sexes preexisting (or outside of) society."

This is expanded by Judith Butler in Gender Trouble. Drawing on post-structuralist theory, Butler criticizes the dependence on a pre-discursive sex upon which gender would be constructed, instead proposing gender as a performative doing.

Psychoanalysis
In This Sex Which is Not One (1977), Luce Irigaray seeks to create a psychoanalytic narrative that incorporates Lacanian ideas while challenging its phallocentric elements. Irigaray contends that women can cultivate a sense of identity and sexuality without needing to conform to phallic ideals, and that the female body is multifaceted and constantly evolving.

Performativity
Judith Butler's theory of gender performativity can be seen as a means to show "the ways in which reified and naturalized conceptions of gender might be understood as constituted and, hence, capable of being constituted differently." Butler uses the phenomenological theory of acts espoused by Edmund Husserl, Maurice Merleau-Ponty and George Herbert Mead, which seeks to explain the mundane way in which "social agents constitute social reality through language, gesture, and all manner of symbolic social sign."

On Butler's hypothesis, the performative aspect of gender is perhaps most obvious in drag performance, which offers a rudimentary understanding of gender binaries in its emphasis on gender performance. Butler understands drag cannot be regarded as an example of subjective or singular identity, where "there is a 'one' who is prior to gender, a one who goes to the wardrobe of gender decides with deliberation which gender it will be today". Consequently, drag should not be considered the honest expression of its performer's intent. Rather, Butler suggests that what is performed "can only be understood through reference to what is barred from the signifier within the domain of corporeal legibility".

According to Butler, gender performance is subversive because it is "the kind of effect that resists calculation", which is to say that signification is multiplicitous, that the subject is unable to control it, and so subversion is always occurring and always unpredictable. Rosalyn Diprose lends a hard-line Foucauldian interpretation to her understanding of gender performance's political reach, as one's identity "is built on the invasion of the self by the gestures of others, who, by referring to other others, are already social beings". Diprose implies that the individual's will, and the individual performance, is always subject to the dominant discourse of an Other (or Others), so as to restrict the transgressive potential of performance to the inscription of simply another dominant discourse.

Female energy
Feminist theologian Mary Daly proposed in her remarkable work Gyn/Ecology (1978) the existence of a feminine nature that should be defended against "male barrenness". "Since female energy is essentially biophilic", she writes, "the female spirit/body is the primary target in this perpetual war of aggression against life. Gyn/Ecology is the reclaiming of life-loving female energy."

Janice Raymond had Daly as her advisor when writing The Transsexual Empire (1979), in which she states: "It is not hard to understand why transsexuals want to become lesbian-feminists. They indeed have discovered where strong female energy exists and want to capture it."

Realism versus nominalism
In the context of feminist metaphysics, the problem of universals led to a division between gender realists and gender nominalists. Elizabeth Spelman identified in the 1980s a predominance of realism in Western feminist theory, which she accused of overlooking the differences between women. Nominalism has since become the hegemonic view.