In an article in Atlantic, Jonathan Haidt observes the disintegration of society because of social media. He explains the problem of "Structural Stupidity" that arises when a consensus becomes immune from, and impervious to, contrary views, even from within the community.
It's the opposite of Joseph Smith's observation that "by proving contraries, truth is made manifest.” https://www.josephsmithpapers.org/paper-summary/letter-to-israel-daniel-rupp-5-june-1844/1
Haidt predictably places his thumb firmly on the Left side of the scale, justifying and rationalizing the themes of the political left, but his description of the problem is useful and relevant nonetheless.
Our M2C and SITH citation cartels have created structural stupidity in much the way that Haidt describes here.
Since the tower [of the metaphorical Babel] fell, debates of all kinds have grown more and more confused. The most pervasive obstacle to good thinking is confirmation bias, which refers to the human tendency to search only for evidence that confirms our preferred beliefs. Even before the advent of social media, search engines were supercharging confirmation bias, making it far easier for people to find evidence for absurd beliefs and conspiracy theories, such as that the Earth is flat and that the U.S. government staged the 9/11 attacks. But social media made things much worse.
The most reliable cure for confirmation bias is interaction with people who don’t share your beliefs. They confront you with counterevidence and counterargument. John Stuart Mill said, “He who knows only his own side of the case, knows little of that,” and he urged us to seek out conflicting views “from persons who actually believe them.” People who think differently and are willing to speak up if they disagree with you make you smarter, almost as if they are extensions of your own brain. People who try to silence or intimidate their critics make themselves stupider, almost as if they are shooting darts into their own brain....
So what happens when an institution is not well maintained and internal disagreement ceases, either because its people have become ideologically uniform or because they have become afraid to dissent?
This, I believe, is what happened to many of America’s key institutions in the mid-to-late 2010s. They got stupider en masse because social media instilled in their members a chronic fear of getting darted. ...But when an institution punishes internal dissent, it shoots darts into its own brain....
American politics is getting ever more ridiculous and dysfunctional not because Americans are getting less intelligent. The problem is structural. Thanks to enhanced-virality social media, dissent is punished within many of our institutions, which means that bad ideas get elevated into official policy. ...
Depression makes people less likely to want to engage with new people, ideas, and experiences. Anxiety makes new things seem more threatening. As these conditions have risen and as the lessons on nuanced social behavior learned through free play have been delayed, tolerance for diverse viewpoints and the ability to work out disputes have diminished among many young people. For example, university communities that could tolerate a range of speakers as recently as 2010 arguably began to lose that ability in subsequent years, as Gen Z began to arrive on campus. Attempts to disinvite visiting speakers rose. Students did not just say that they disagreed with visiting speakers; some said that those lectures would be dangerous, emotionally devastating, a form of violence. Because rates of teen depression and anxiety have continued to rise into the 2020s, we should expect these views to continue in the generations to follow, and indeed to become more severe.