I went and looked through The American Conservative site more carefully, here is what it says:
Today the country pays the price for the left-wing ideologies that ran rampant in the 20th century and the right-wing, but not conservative, reaction that has only exacerbated the destruction wrought by the left.
That's some mind-killing stuff right there. And the writeup by Alan Jacobs spins the linked article on group productivity a fair bit, too. Surely you could have found a less biased source to quote. Here is one for example.
A fun article by Alan Jacobs. Check out the paper he cites, if anyone finds an non-paywalled version, I'll edit in the link here. HT for the link to Michael Bloom.
I really do need to find more written by this author. But while I certainly do very much share this sentiment I have a hard time figuring out how common it is. After all people don't look good saying they "don't like meeting new people".