 Many have found the fragmentation of the category of women problematic for political reasons (e.g. Alcoff 2006; Bach 2012; Benhabib 1992; Frye 1996; Haslanger 2000b; Heyes 2000; Martin 1994; Mikkola 2007; Stoljar 1995; Stone 2004; Tanesini 1996; Young 1997; Zack 2005). For instance, Young holds that accounts like Spelman’s reduce the category of women to a gerrymandered collection of individuals with nothing to bind them together (1997, 20). Black women differ from white women but members of both groups also differ from one another with respect to nationality, ethnicity, class, sexual orientation and economic position; that is, wealthy white women differ from working-class white women due to their economic and class positions. These sub-groups are themselves diverse: for instance, some working-class white women in Northern Ireland are starkly divided along religious lines. So if we accept Spelman’s position, we risk ending up with individual women and nothing to bind them together. And this is problematic: in order to respond to oppression of women in general, feminists must understand them as a category in some sense. Young writes that without doing so “it is not possible to conceptualize oppression as a systematic, structured, institutional process” (1997, 17). Some, then, take the articulation of an inclusive category of women to be the prerequisite for effective feminist politics and a rich literature has emerged that aims to conceptualise women as a group or a collective (e.g. Alcoff 2006; Ásta 2011; Frye 1996; 2011; Haslanger 2000b; Heyes 2000; Stoljar 1995, 2011; Young 1997; Zack 2005). Articulations of this category can be divided into those that are: (a) gender nominalist — positions that deny there is something women qua women share and that seek to unify women’s social kind by appealing to something external to women; and (b) gender realist — positions that take there to be something women qua women share (although these realist positions differ significantly from those outlined in Section 2). Below we will review some influential gender nominalist and gender realist positions. Before doing so, it is worth noting that not everyone is convinced that attempts to articulate an inclusive category of women can succeed or that worries about what it is to be a woman are in need of being resolved. Mikkola (2016) argues that feminist politics need not rely on overcoming (what she calls) the ‘gender controversy’: that feminists must settle the meaning of gender concepts and articulate a way to ground women’s social kind membership. As she sees it, disputes about ‘what it is to be a woman’ have become theoretically bankrupt and intractable, which has generated an analytical impasse that looks unsurpassable. Instead, Mikkola argues for giving up the quest, which in any case in her view poses no serious political obstacles.