Exhibit A: Greta Thurnberg. A figure of global import who at the age of 16 stands at the head of a peaceful campaign to clean up the planet despite having buckets of polluted bile thrown at her by supposedly “responsible” and “mature” adults every day. She can’t vote in her native Sweden. She wouldn’t be allowed to vote if she held British citizenship either.

Exhibit B: Boris Johnson, a bloviating, law-breaking demagogue who shamelessly, and successfully, encourages violence against other elected representatives. He can.

Extending the franchise to cover 16- and 17-year-olds is very much on the agenda as their elders systematically and wilfully engage in sowing chronic distemper around what was once a decent sort of country.

Opposition parties favour the idea so we may yet join the likes of Austria – where 16 is the age of majority – sooner than you think.

That would be a welcome development.

Opponents of such a move like to argue that 16- and 17-year-olds are not mature enough to make choices about their and the country’s future because, I don’t know, they watch a lot of YouTube and sometimes like to sleep with each other with unintended consequences. As if that can’t happen to anyone with a functional reproductive system.

Greta Thunberg inspires climate activists everywhere: In pictures Show all 12 1 /12 Greta Thunberg inspires climate activists everywhere: In pictures Greta Thunberg inspires climate activists everywhere: In pictures In the protest that started a movement, Greta skips school to sit outside of the Swedish parliament in Stockholm in order to raise awareness of climate change on 28 August 2018 Getty Greta Thunberg inspires climate activists everywhere: In pictures Greta speaks at the World Economic Forum in Davos on 25 January AFP/Getty Greta Thunberg inspires climate activists everywhere: In pictures Greta stages a protest at the World Economic Forum in Davos on 25 January Reuters Greta Thunberg inspires climate activists everywhere: In pictures Greta speaks at the House of Commons in London on 23 April PA Greta Thunberg inspires climate activists everywhere: In pictures Greta addresses to the occupation at Marble Arch in London on 21 April AFP/Getty Greta Thunberg inspires climate activists everywhere: In pictures Greta meets the pope on a visit to Rome Reuters Greta Thunberg inspires climate activists everywhere: In pictures Greta speaks at the senate in Rome on 18 April Reuters Greta Thunberg inspires climate activists everywhere: In pictures Greta addresses a debate of the EU Environment, Public Health and Food Safety committee at the European Parliament in Strasbourg on 16 April AFP/Getty Greta Thunberg inspires climate activists everywhere: In pictures Greta receives the Special Climate Protection Award at the German Film and Television awards in Berlin on 30 March AFP/Getty Greta Thunberg inspires climate activists everywhere: In pictures Greta attends a children's climate protest in Berlin on 29 March AFP/Getty Greta Thunberg inspires climate activists everywhere: In pictures Greta addresses a children's climate protest on 1 March in Hamburg Getty Greta Thunberg inspires climate activists everywhere: In pictures Greta attends a meeting for the Civil Society For rEUnaissance at the EU Charlemagne Building in Brussels on 21 February AFP/Getty

So let’s take on the issue of “maturity”? Yesterday The Times ran a baleful front page warning of riots if our law-breaking gangster government fails to “deliver Brexit”.

Who is it that’s threatening them?

Who is it bandying around words that in another context might get you hauled before the local magistrates for a ticking off together with a demand that you spend some time cleaning up the local canal? Incitement to riot is a crime, in case you hadn’t noticed.

It certainly isn’t 16- and 17-year-olds. It isn’t 18- or 19-year olds for that matter.

You might find a fair number of teenagers cheerfully waving signs with the occasional potty-mouthed joke on them while enthusiastically blowing whistles at Final Say marches.

You won’t find them caving in the windows of MPs’ offices as has been happening in recent days.

It is a corps of mostly middle-aged and older men egged on by Tory MPs in an unholy alliance with those on their (far) right flank, who are engaging in that sort of behaviour.

But, but, but, how on earth can we let them vote when we don’t let them drink?

Yes, I’ve seen variants on that one. Growing up is a process. You get different rights and different responsibilities at different ages.

That thing about alcohol, which you can obtain fairly easily at 16 (I did and I doubt it’s changed much since I was a teenager) is that it is a drug that, once again, plenty of older folks regularly prove they are not mature and responsible enough to handle. A good example would be a government advisor by the name of Dominic Cummings, who’s fond of confronting shadow cabinet members while stinking of wine late at night.

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By the way, you are criminally responsible at the age of 10, far younger than in most European countries. I’m not going to argue that a 10-year-old should get the right to vote on the criminal justice system that considers them as responsible as an adult for their actions. But perhaps the “they’re not mature enough to vote” brigade might like to spend some time addressing that one.

What you can do at 16 is jump into bed with a partner of your choice (see above) pay taxes and make decisions about your future – mostly you’ll be in education but the choice regarding the direction you take is still yours. You can also marry and pick up a gun in the service of your country although you’ll have to get your parents’ approval.

Some of those parents (and grandparents) are not excelling themselves when it comes to setting an example, and particularly the parent in Downing Street. Has anyone established how many kids he has yet? Or how many he is actually involved in the lives of?

Goodness me, my 11-year-old shows more maturity and more responsibility than the Incredible Sulk does.

I’m not arguing he should have the vote. He’s only part way through his schooling for a start. But in five years’ time he and his schoolmates will have a knowledge of history, government, and the rights and responsibilities of British citizenship that is a good deal sharper and fresher in mind than most of their elders.

He and his friends will almost certainly behave better too.

It’s high time we let them cast their verdict on the way those elders are running things.