Five states, a Catholic hospital network, and two medical associations have sued the Obama administration in federal court to stop a rule that would force doctors to act against their medical and ethical judgment.

President Obama’s new rule is on the social issue du jour: transgenderism. It was promulgated in May, when it was billed as a simple non-discrimination measure. But it goes well beyond that. It radically redefines what “sex” means in federal and common law, and what humanity has understood it to mean since time immemorial.