Several people sent me Mark Steyn's YouTube video—he has a video channel he calls SteynPosts—from last Wednesday.

It's a 23-minute clip, right there on YouTube, and well worth your attention.

Mark takes recently-elected French president Emmanuel Macron and his new political party as the starting point for his commentary. He refers to Macron as "this cipher, this globalist pretty boy." He translates the name of Macron's party, En Marche!, as "Forward!" Mark called this "a vacuous slogan."

This recent Presidential election in France was, said Mark, a consequential election; but the guy who won, "won by pretending it was an election about nothing."

To support his case, and to set the hearts a-fluttering over here on the Dissident Right, Mark then pulled out Steve Sailer's graph, the graph I was talking about two weeks ago, what Steve calls "the world's most important graph." This is the graph Steve made from the U.N.'s 2012 population projections, showing the population of Europe flatlining at around half a billion through the rest of this century while the population of Africa rockets up to over four billion:

To Mark's credit, he references Steve by name, and agrees with him about the importance of those numbers.

As I told you two weeks ago: this is what we should have at the front of our minds when thinking about the future. This is what our pundits should be talking about: not just pundits on the political fringe, like Mark, or pundits way beyond the fringe, like me and Steve, but the bigfoot guys at the newspapers, magazines, and cable channels.

Ranked on a scale from one to ten, as matters that are important to our future—the future our children and grandchildren will inhabit—that graph is a ten. Global warming is a two or a three; Russian interference in last year's election is around a zero point zero one.

So why don't we talk about it? Why is such a huge, real issue so unmentionable?

Where Europe is concerned, Mark identifies part of the problem as relating exactly to our children and grandchildren—or rather, to the fact that Europeans aren't having any.

Mr. Macron, for example, is childless. So is German leader Angela Merkel. So is British Prime Minister Theresa May. The President of Italy has three kids, but Italy's Prime Minister is childless. So is Mark Rutte, Prime Minister of Holland. Mark has some fun with Belgium: the current Prime Minister has two kids, but the previous one was a childless homosexual.

Why, Mark wonders rhetorically, would we expect these barren politicians to think hard thoughts about the world of twenty, fifty, eighty years from now? They have no personal stake in that world.

The great English economist John Maynard Keynes famously said that "In the long run we are all dead." You can get into trouble—historian Niall Ferguson did get into trouble—for observing that Keynes was a childless homosexual when he wrote that. [ Niall Ferguson apologises for remarks about 'gay and childless' Keynes, by  Paul Harris, Guardian, May 4, 2013 ]  (Keynes later married, though he never did have children.)

There is something in the observation, though. I know I've thought differently about the future since becoming a father. Who doesn't?

That graph—the world's most important graph—looms over the 21st century like a monstrous great crow. Yet we can't talk about it. Or rather, I can, and Mark can; but no-one with much more of a profile than us, can.

Why not? Do you need to ask? That line shooting up on the graph represents Africa—black people (mostly), and a high proportion of them Muslims. The other line, the one plodding along horizontally, represents Europe—white people (mostly), and a very high proportion not Muslims.

In the state ideologies of the Western world, black people are sacred objects to whom whites must defer, Muslims only slightly less so. Nothing negative may be said about these peoples, nor even hinted.

So Mark's gloomy prognostications about Europe being swamped, and European civilization destroyed, by incoming hordes of blacks and Muslims, are out of bounds. In several European countries, including I think France, it would actually be a criminal offense to say such things in public.

That's the state we're in. The real issues, the important issues—vitally important to our children and grandchildren, those of us who have any—may not be openly discussed.

Global warming? Sure. Russian hacking? Oh definitely. Homosexual marriage? Let's have a debate!

But … world demographics? Why would you be interested in that? What are you, some kind of Nazi?

Now that we've got Mark Steyn talking about the world's most important graph, next we should try to get him helping promote the Arctic Alliance.

It's way past the time when we high-IQ, low-fertility, long-civilized Arctic peoples—the whites and the yellows—can afford to bicker among ourselves, about election hacking or anything else. We should be putting our smart, pale heads together to plan a geostrategy to preserve our nations, our civilization, from the swelling numbers down there in the tropics who seek to displace us by demographically overwhelming us.

I quipped recently about making the Russian Ambassador our new FBI Director. Is that really a great idea? No, not really a great one. A pretty bad one, actually.

On any reasonable scale of badness, though, its badness fades to insignificance, to nothing at all, by comparison with really really bad ideas: ideas like continuing mass Third World immigration, or restarting the Cold War with Russia.

A nation can survive having a foreigner of doubtful loyalty in charge of one of its law-enforcement agencies, but it can't survive having its population replaced by alien peoples. If that happens, the country is no longer what it was. It's a different country.

That's the condition we're in. Really really bad ideas, lethally bad ideas, existentially disastrous ideas, are respectable, in fact well-nigh compulsory. Ideas that are mildly silly but not permanently harmful are considered outrageous.

That's our condition.

John Derbyshire [email him] writes an incredible amount on all sorts of subjects for all kinds of outlets. (This no longer includes National Review, whose editors had some kind of tantrum and fired him. ) He is the author of We Are Doomed: Reclaiming Conservative Pessimism and several other books. He’s had two books published by VDARE.com: FROM THE DISSIDENT RIGHT (also available in Kindle) and From the Dissident Right II: Essays 2013. His writings are archived at JohnDerbyshire.com.