"Starting decades ago, many people, especially in the universities, lost faith in the Western civilization narrative."

Lost faith?  I was taught that Western Civ was supposedly founded on a hard-edged search for truth(ie. The Enlightenment), not mere faith. 

The "narrative" was always one-sided in that the evils perpetrated by Western Civ were mostly swept under the rug, and now the pendulum has swung a bit in the other direction, too much for poor Brooks obviously( self examination is so dreadfully hard). One doesn't need to visit old history books to witness the West's ongoing oppression, just look at the cauldron that is the Middle East as exhibit A. To use a movie phrase that fits those who parrot the Western "values" trope, as Brooks does, to a "T", "The truth? You can't handle the truth!"  
Brooks would have us believe that the world will collapse into anarchy while he ignores the fact that said anarchy is being largely fomented by Western(US especially) actions.