A new law makes clear that sex is determined by biology not ideology

Justice Ruth Bader Ginsburg fought throughout her career for women’s rights — “on the basis of sex.” But since “sex” merged into “gender” three decades ago, the entire area of sex-based rights has become blurred.In the United Kingdom, they have suddenly become unblurred and — legally — crystal clear. In a landmark ruling, the UK Supreme Court established last week that the words “sex” and “woman” solely refer to biological sex when it comes to equality laws — and language.

The implications of this landmark ruling will be felt not only in the UK, but worldwide.It is the first time a legal ruling has reaffirmed the sex-based rights we were in danger of losing altogether.Sex is binary and immutable.

Women’s rights derive from biological factors and their reproductive role.The UK Supreme Court has looked at absurdities such as “pregnant men” and “male lesbians” and said, “No.”What changes can we expect to ensue from this ruling? First, the UK transport police, who were until last week insisting that male officers who “identify” as women can strip-search women, have immediately reversed their position.

Cases involving female nurses objecting to being expected to undress alongside male colleagues who “identify” as women are now likely to be swiftly resolved.These nurses will now be entitled to a single-sex locker room.More widely, I hope the ruling bolsters efforts to stop schools teaching kids that some people are “born in the wrong body” and/or might benefit from pediatric gender medicine (“gender affirming care.”) It’s not possible to change sex.

And the growing move to protect women’s and girls’ athletics from the incursions of males who “identify” as female will likely gather steam, too.The UK Supreme Court’s detailed, 88-page ruling strips away the entire façade of “identifying” as the opposite sex.Gender identity doctrine is a regressive, misogynistic set of beliefs that is pitted ag...