Most of these politically correct fads are just designed to wind us up and provoke us. For example, I now regret having wasted so much time trying to argue rationally about same-sex marriage. All the sexual revolutionaries wanted was an excuse to call me a bigot. They could then ignore everything I said, or tell lies about me, or both.

It was a tiny issue. In 2014, for example, in England and Wales, there were 247,372 heterosexual weddings, and 4,850 same-sex marriages. Already there are several hundred same-sex divorces each year.

Once the novelty has worn off, I suspect the numbers of same-sex unions will decrease, just as heterosexual ones are doing. The point - that the old ways are dead and gone - will have been made, and the campaigners will move on to something else.

I once thought the same about the transgender issue. But the idea that people are whatever sex they think they are is a terrifying weapon in the hands of modern Thought Police. Whatever you say, you cannot possibly be right about this.

Express any opinion (apart from total submission), and within minutes you will be besieged by condemnation. It will be cleverly based on the idea that you are somehow being cruel to some troubled person, even though you aren't doing this at all.

But that is just a pretext. In reality, a whole moral and social system is being destroyed, and traditional ideas of male and female are the next target, now that husbands and marriage have been done away with. For once you begin down the road of sexual revolution, there's no end. There will always be someone more militant than you.

Since the French Revolutionaries set up the guillotine, the same thing has been true. Revolutions are all based on the false idea that humans and their nature can be changed.

And once changed, they will fit neatly into the Utopia that is planned for them. Utopia, as we find every so often in Russia, China and Cambodia, can only be approached across a sea of blood, and you never actually arrive.

The opposite view (now very unfashionable) is that we are all made in the image of God and cannot be changed into something else. This sounds odd to most modern ears. But in fact it is the foundation for the absolute respect for human life and liberty which underpins civilisation. Once it's gone, you can make excuses for anything in the name of some invented 'right'. Mass abortion is the obvious example.

And that is why The Mail on Sunday's exclusive story, that a teacher has been disciplined for failing to respect the transgender gospel, is so important. His slip was small, and momentary. One of his pupils, who would once have been called a girl, has decided to be male. He called this person a girl. So he must suffer.

In the vanished world of absolute truth, the student's sex would not be a matter of opinion. People might (and I would favour this) treat the person's view of their sex with sympathy and try to go along with it. Who would want to hurt somebody on a matter of such delicacy?

But in the new revolutionary world, truth is what the revolution says it is.
This works in many ways.

A Left-wing newspaper recently claimed I had said something I had not said, and do not think. Shown irrefutable evidence that I had not used the words alleged, it continued to claim that I had used them, because that is what it thought I had said.

This leads down a very dark staircase. Reality must increasingly be forced to fit the beliefs of the new elite. Teachers must be punished for speaking the truth, so schools are no longer places where truth is respected or dissent allowed - which means they are dead, to all intents and purposes.

And perhaps most grievous of all, teenagers are placed on a medical conveyor belt which leads to powerful body-changing drugs and possibly to surgical alteration.

It is not just crabbed reactionaries such as me who fret about this. In an eloquent article in The Times, the far-from-conservative commentator Janice Turner recently warned: "But in a decade, when our adult children turn to ask, 'Why did you let me do this? Why didn't you stop me?' we may wonder if this was progress or child abuse."

The answer to the question 'Why didn't you stop me?' will be even sadder.

We are failing to stop this because we are afraid of the intolerant revolutionary mob, which would lock up dissenters if it could, but for the moment contents itself with Twitter storms and witch-hunts.

I can't laugh this off. It is not just a wind-up. It is a threat to free thought
and, after many months of staying silent about it, I feel I have to say so.

That faint rumble you can hear is the mob assembling for another heresy hunt.