I think the believed "loss of discipline" on GN is a whole other thread. However, Rory Stewart points to the fact that political voices are no longer debating with each other they are simply talking past each other. I would say voices generally on social media do this.
Back to The Long History of Argument. I have gone back to the beginning to listen again. Stewart talks of how political arguments changed in about 2014. He comments that this was the time of Bolsonaro in Brazil, Modi in India, the Brexit referendum and Trump in America. Then we have the suggestion that political arguments changed in a "dramatically short period of time". Backed by a psychiatrist, he suggests this is because of a vicious cycle of one extreme creating the opposite extreme.
Maybe we must ask ourselves if the extreme view we oppose was created and carefully worded to make us do that very thing. From this small part of the broadcast, I agree that the "only my political view is valid" does close down many debates, not only political ones.
If someone disallows all other political views, doesn't that call into question all their views in other areas? Are their arguments about how the economy works, facts that should be proved accurate under all political conditions, going to be skewed by their own extreme bias? Are someone's views on a medical intervention built on the same inflexibility as their politics?
What do you think?