Gender-critical feminism, also known as trans-exclusionary radical feminism or TERFism, is an ideology or movement that opposes what it refers to as "gender ideology". Gender-critical feminists believe that sex is biological, immutable, and binary, and consider the concepts of gender identity and gender self-identification to be inherently oppressive constructs tied to gender roles. They reject transgender identities; for example, they describe trans women as men.
Originating as a fringe movement within radical feminism mainly in the United States, trans-exclusionary radical feminism has achieved prominence in the United Kingdom and South Korea, where it has been at the centre of high-profile controversies. It has been linked to promotion of disinformation and to the anti-gender movement. Anti-gender rhetoric has seen increasing circulation in gender-critical feminist discourse since 2016, including use of the term "gender ideology". In several countries, gender-critical feminist groups have formed alliances with right-wing, far-right, and anti-feminist organisations.
Gender-critical feminism has been described...