What the trans movement represents to the left is not just another identitarian group that they can use to push authoritarianism. It's much more than that. It's as close as anyone has ever come to overriding people's biology and asserting control over individual identities.

Authoritarians have always resented evolutionary psychology because it means that there will always be some aspects of individual behaviour, and therefore of society, that they cannot fully control. The revolution can never be completely secure until they have control of that as well.

There are three types of revolution. The first and most superficial is the political revolution: the transformation of the way the individual interacts with the state. There American Revolution is an example of this, and it was successful because nothing else changed: the country was still Christian, English speaking and all of the building blocks that comprised communities and the broader society remained the same. All that changed was the way in which those communities interacted with the institutions that governed them.

The second is the social revolution, or the transformation of the way people interact with each other. Authoritarians will always attempt this in order to consolidate their control and try to suppress dissent: eliminating traditional religion and trying to replace it with Robespierre's Cult of the Supreme Being, or with worship of the State, or more recently the worship of The Science. Editing the language by forbidding certain words or introducing new ones, or by changing what words mean.

The problem with this phase of the revolution is that it's never successful in the long term, because it inevitably involves trying to force people to behave in ways that don't cohere with their natural, biological programming. It's never going to be possible to supplant the nuclear family with the State, for example, even though every totalitarian tries it, because otherwise the society you govern is built on a fundamental power structure that you don't control.

But the third type of revolution is the personal, or the transformation of the way the individual interacts with himself. This is obviously the hardest to achieve, but the trans movement represents a concerted effort to do just that.

It's impossible to overstate how important gender is to our sense of identity: it informs almost every aspect of how we think, how we behave, how we interact with other people. If they can convince an entire generation of young people to abandon gender, to deny something they know instinctively, fundamentally to be true about themselves, then what's left is a generation of alienated, hormonally-unbalanced blank slates with no core sense of their own identity and no emotional capacity to resist further conditioning.

Most of the footsoldiers championing the trans cause may not understand this on an intellectual level, but instinctively, I think they do. They realize the implications this could have for their social project, and that's why they will always prioritize it over every other one of their pet causes. In the UK schools debate between Muslim parents and the trans lobby, it was the trans lobby who won. The reason for that is that as much as the left fetishize Islam for the destabilizing effect it has on our society, the trans movement will always be more important to them, whether it ends up being successful or not.