The Simpsons creator Matt Groening doesn’t do many interviews. Apparently, he announces at the start of ours, he doesn’t “have much more to say”.

Forty minutes later, after diving through topics from his latest Netflix show to memes and… er, monorails, it’s clear he was wrong – there’s plenty still to discuss.

Not least, accusations that some of The Simpsons’ ethnic minority characters, all historically voiced by white actors, encourage harmful stereotypes.

After a backlash prompted by a 2018 documentary called The Problem With Apu, the show has spent the last year re-casting its non-white roles.

“Times change,” Matt tells us, “but I actually didn’t have a problem with the way we were doing it.

“All of our actors play dozens of characters each, it was never designed to exclude anyone.”

At first, the show’s response was along these lines too. Within an episode, Lisa looked directly into the camera, saying: “Something that started decades ago and was applauded and inoffensive is now politically incorrect. What can you do?”

Eventually, though, The Simpsons backtracked and announced it was making changes after all.

The latest came on Monday, when it was reported that Harry Shearer is to be replaced as the voice of Dr Hibbert by Kevin Michael Richardson, known for his voice work on American Dad! and Family Guy.

Asked whether he regrets how they handled it, Matt says: “At a certain point it doesn’t matter what you say. You’re going to be attacked by whoever, you know?

“We’re not going out of our way to comfort bigots. On the other hand, if you do any kind of gesture and people perceive a weakness, you’ll be criticised.”

He does, however, accept that change was needed – and not just with actors, but across the entire industry.

“I absolutely agree with that. And we’re trying to make it better,” he says.

“Bigotry and racism are still an incredible problem and it’s good to finally go for more equality and representation.”

Matt is speaking to us over Zoom from the chair he’s been “sitting on since the beginning of the pandemic”.

He’s working on new episodes of his Netflix series, Disenchantment, but before we got into that, we had to address the monorail in the room.—60372c150b5bd57f71ee4196

When he first doodled a smiley yellow family, he probably didn’t expect, 30 years later, to be apologising to the monorail community.

He looks a bit upset when we point out that The Monorail Society, made up of 14,000 members worldwide, is on record saying The Simpsons has a lot to answer for.

“I don’t know what to say, I’m sorry,” he laughs, “That’s a by-product of our viciousness.”

The episode we’re talking about – one of the show’s most iconic – is Marge Versus the Monorail, where the town of Springfield is conned into ploughing all its money into a doomed public transport system.

It was first shown in 1993, but became so popular with fans that it’s been blamed for the fact single-railed trains aren’t always taken as seriously as their double-railed cousins.

“You’re up off the ground and you’re above traffic. Monorails are great,” Matt says.

“So it makes me sad, but at the same time if something’s going to happen in The Simpsons, it’s going to go wrong, right?”

A small impact on town planning is possibly not that big a deal in the context of a show that’s been going longer than many of its fans have been alive, is broadcast in dozens of languages, and has predicted the future several times.

“It’s unbelievable,” Matt says. “I just couldn’t have imagined it back in the day when I was a struggling cartoonist, drawing on a wobbly card table in my kitchen.”